Category: Behind The Black

Kodo – O-Daiko

6:01 pm

An evening pause: Japanese drummers playing the Ōdaiko drum

Ōdaiko : One of the most memorable drums of many taiko ensembles is the ōdaiko (大太鼓). For many, the ōdaiko solo is the embodiment of power due to the size of the drum, the volume, and the endurance it takes to perform. The ōdaiko is the largest drum of all taiko, if not the entire world. The largest ōdaiko are too big to move and permanently reside inside a temple or shrine. Ōdaiko means “big taiko”, but within any group, it describes the largest drum in an ensemble, which could mean 12 inches (300 mm) in diameter or 12 feet (3.7 m) in diameter. Made from a single piece of wood, some ōdaiko come from trees that are hundreds of years old.

Hat tip Roland.

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Fading Martian slope streaks

2:30 pm

Fading Martian slope streaks
Click for full image.

Cool image time! I’ve covered the topic of the mysterious slope streaks on Mars previously in great detail (see here and here). Essentially they are generally dark streaks (but sometimes light) that appear randomly on slopes and then fade over time. Unlike recurring slope lineae, another changing streak found on Martian slopes, the coming and going of slope streaks is not tied to the seasons. They can appear at any time in the year, and will take several Martian years to fade away.

The image to the right, rotated, cropped, and reduced to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on March 26, 2020. It shows numerous slope streaks down the eastern interior rim of a crater in the transition zone between the northern lowlands and the southern cratered highlands in a region dubbed Arabia Terra.

Though I can find no previous high resolution image of this crater to measure any temporal changes, you can clearly see that this slope has experienced many streaks over time, with some darker than others. The different shades suggest that the lighter streaks are older and have faded, with the darker streaks more recent events.

At the moment there is no strong consensus on the causes of these streaks. As one science paper noted, “The processes that form slope streaks remain obscure. No proposed mechanism readily accounts for all of their observed characteristics and peculiarities.” We know they occur in equatorial regions and dusty locations, and that they are triggered by some disturbance at the topmost point of the streak, which then causes a chain reaction down the slope. Other than that, the facts are puzzling, and suggest that these streaks are a phenomenon wholly unique to Mars.

The crater itself, located at 24 degrees north latitude, has some other mysteries. The features on its floor, for instance, are very puzzling. Though suggestive of the buried glaciers found in many craters in the mid-latitudes, this crater is a bit too far south. Maybe its higher altitude allows for some ice to remain here? Then again, the features on that floor might have nothing to do with ice. Maybe we are looking at sand carved by wind? Or hardened mud that was once wet?

I am merely guessing, a dangerous thing to do when one’s knowledge is limited. Then again, it’s fun, so please join in with your own guesses.

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India to give private space access to ISRO facilities

10:00 am

The new colonial movement: India’s government has announced that private commercial space companies will be given full and equal access to the facilities operated by its space agency, ISRO.

The private sector will be allowed to use ISRO’s facilities and assets and they will be provided a level-playing field in satellites, launches and space-based services, Union Minister Jitendra Singh said on Tuesday, days after the government announced opening up of the domain.

Future projects for planetary exploration and outer space travel will be open for the private sector, he added. ‘Private companies to be provided a level-playing field in satellites, launches and space-based services. Future projects for planetary exploration, outer space travel will be open for the private sector,’ he said in a statement.

If true, what this means is that if a private company builds its own rocket, it will be allowed to use ISRO’s launchpads to launch from. It also means that the government does not want ISRO to lord over those private companies.

Whether this will happen as intended however remains a question. In essence this is the same turf war between the private sector and a government-run industry that has been playing out in the U.S. Here, the private sector appears to be winning, mostly because of the effort of SpaceX. I am not sure what will happen in India, as they don’t yet have any companies like SpaceX to push the issue.

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S7 now in “negotiations” to sell Sea Launch to Russian government

9:50 am

Nice launch platform you got here. Be a shame if something happened to it: The private Russian airline company S7 is now in “negotiations” to sell the Sea Launch floating rocket launchpad to one of the Russian government’s state corporations, because it appears the Russian government is imposing such high fees on its operation the company can’t make a profit.

The second source confirmed the information, adding that “given the condition of the platform and the commander ship following the US side’s removal of equipment, and in connection with the need to create coastal infrastructure from scratch, costs of implementing the project are estimated as high.”

“Considering financial losses sustained as a result of the pandemic, a private company simply has no money to do that,” he added.

Previously the company had suspended operations because the Russian government had suddenly increased drastically the fees it was charging the company. I said then that this was simply a power play by that corrupt government to grab control of the launch platform. It appears now that this mob-like grab is succeeding.

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Parker successfully completes fifth solar fly-by

9:42 am

The Parker Solar Probe has signaled scientists that it has successfully completed its fifth solar fly-by without damage.

On June 9, 2020, NASA’s Parker Solar Probe signaled the success of its fifth close pass by the Sun, called perihelion, with a radio beacon tone. The spacecraft completed the fifth perihelion of its mission two days prior, flying within 11.6 million miles from the Sun’s surface, reaching a top speed of about 244,225 miles per hour, which matches the spacecraft’s own records for closest human-made object to the Sun and fastest human-made object, set during its fourth orbit on January 29.

Mission controllers at the Johns Hopkins Applied Physics Laboratory in Laurel, Maryland, received a “status A” beacon from the spacecraft at 4:40 p.m. EDT. Status A is the best of four possible status signals, and indicates that the spacecraft is operating nominally and the instrument suites are collecting science data. This beacon tone comes after a five-day period where communications with the spacecraft were not possible.

The data from this fly-by will arrive during the summer. Meanwhile, the spacecraft will next do a fly-by of Venus to slow it down further so that it can get even closer to the Sun on its next orbit.

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Scientists to appease racist Black Lives Matter movement

9:19 am

Yesterday I received an email press release from the American Astronomical Society (AAS), stating the following:

The American Astronomical Society (AAS) endorses the grassroots efforts to #ShutDownSTEM, #ShutDownAcademia, and #Strike4BlackLives on Wednesday, 10 June. The AAS Board of Trustees encourages everyone in our community to make a lifelong commitment to action to eradicate anti-Black racism in the astronomical sciences, in other STEM (science, technology, engineering, and mathematics) fields, and in academia and research more generally.

Internally at the AAS Executive Office, regularly scheduled Wednesday meetings have been cancelled and staff have been given the option of using the day to find time and space for individual reflection, learning, and action. We have postponed a professional development webinar that was originally scheduled for 10 June and will not be using email, Zoom, or any of our other communication channels for normal Society business that day.

THIS MEANS WE WILL NOT DISTRIBUTE ANY PRESS RELEASES ON WEDNESDAY, 10 JUNE.

This action by the AAS is part of a new kowtowing effort by scientists, dubbed #ShutDownSTEM and ‘Strike For Black Lives’, that is calling for a worldwide pause in all science work today, June 10, to signal their solidarity with that movement. As stated by these quislings at the second link (from the science journal Science):

Those who participate should “stop all usual academic work for the day, including teaching, research, and service responsibilities,” the organizers of Strike For Black Lives write on their website. Black strikers should spend the day doing “whatever nourishes their hearts,” it states, while non-Black strikers should “take actions that center Black lives and agitate for change in our communities.”

I wish to note that what will “nourish my heart” today will be to continue to work, as normal, posting and writing. I am also stating herewith that this feel-good do-nothing protest is a piece of garbage and will do nothing to end bigotry. If anything, it will increase it in its biased political favoritism towards one race over all others. Moreover, this protest is really nothing more than a political movement aimed at gaining power, and since I disagree with its political goals (favoring blacks in all things over everyone else), I will not only not participate, I will bluntly condemn it.

I realize in this increasingly fascist country, this action on my part might cause me trouble. So be it. I do not bow to tyrants, or bigots.

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NASA aiming for late July/early August Dragon crew return

9:39 pm

According to statements made by NASA officials today, the agency is now targeting a late July to early August return date for the first manned Dragon.

Bob Behnken, one of the two Dragon astronauts, will likely do two spacewalks while on ISS to replace batteries on the stations main truss. In addition, they will do a number of tests of Dragon to check out its in-space long term operation.

Mission controllers planned to place the Dragon capsule into a hibernation mode, then wake up the ship’s systems to verify the spacecraft can perform its role as a quick-response lifeboat to scurry astronauts back to Earth in the event of an emergency. Mission managers are also checking data to monitor the status of the solar arrays.

It appears however that the biggest factor for determining the launch date will be weather conditions in the Gulf of Mexico. If they are good in late July mission managers might decide to return the astronauts earlier to take advantage of those conditions.

The next Dragon manned flight, carrying four astronauts, is planned in late August, thus giving NASA time to do a full assessment of this first demo flight before its launch.

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“Insane” & “Mad rush” to escape New York & San Francisco

2:40 pm

As people always do, they flee fascist and oppressive states. And now they are doing so from the Democratic Party strongholds of New York and San Francisco.

In both cases, I am sure it isn’t just fear of the Wuhan flu. People are also fleeing the lock downs, the violence and looting in connection with protests related to George Floyd’s death, and the overall tyrannical bankrupt rule by Democrats in both places.

Trust me, it is only going to get worse. I have great doubts the voters will throw these bankrupt Democrats out of office in November, which means the mad rush will continue. Just like East Germany in the 1950s, people will not sit and suffer in a communist fascist state, if they have an option to leave. And just like in East Germany, I will not be surprised if the leaders in both New York and San Francisco, assuming the voters make no change, take more restrictive actions to stop the flight.

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OSIRIS-REx spots sun-caused erosion on Bennu

10:08 am

Rock on Bennu showing exfoliation
Click for full figure.

An analysis of images taken by OSIRIS-REx of the asteroid Bennu has allowed scientists to identify places where the changing temperatures from day to night has caused the surfaces of rocks to flake away, a process geologists label exfoliation.

The image on the right, cropped and reduced to post here, is from figure 1 in the paper. The yellow arrow points to a typical example of exfoliation, which is a process you can see on many rocks here on Earth.

Rocks expand when sunlight heats them during the day and contract as they cool down at night, causing stress that forms cracks that grow slowly over time. Scientists have thought for a while that thermal fracturing could be an important weathering process on airless objects like asteroids because many experience extreme temperature differences between day and night, compounding the stress. For example, daytime highs on Bennu can reach almost 127 degrees Celsius or about 260 degrees Fahrenheit, and nighttime lows plummet to about minus 73 degrees Celsius or nearly minus 100 degrees Fahrenheit. However, many of the telltale features of thermal fracturing are small, and before OSIRIS-REx got close to Bennu, the high-resolution imagery required to confirm thermal fracturing on asteroids didn’t exist.

The mission team found features consistent with thermal fracturing using the spacecraft’s OSIRIS-REx Camera Suite (OCAMS), which can see features on Bennu smaller than one centimeter (almost 0.4 inches). It found evidence of exfoliation, where thermal fracturing likely caused small, thin layers (1 – 10 centimeters) to flake off of boulder surfaces. The spacecraft also produced images of cracks running through boulders in a north-south direction, along the line of stress that would be produced by thermal fracturing on Bennu.

The typical erosion processes that can cause exfoliation (weather, gravity) are not possible on tiny Bennu, so the solution appears to rest with sunlight and sunlight alone.

This is not really a surprising result, but it is the first time it has been documented by data.

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ULA on schedule for maiden flight of Vulcan in early 2021

9:49 am

Capitalism in space: According to ULA, the development program for its new Vulcan rocket remains on schedule, and will make its maiden flight in early 2021 as initially planned.

The launch will send Astrobotic’s privately built Peregrine lander to the Moon, carrying NASA science instruments.

The article provides a good overview not only of the status of construction, but also the political history that forced the development of Vulcan, that being the insistence by Congress that ULA stop using Russian engines in its rockets.

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A global map of rockfalls on the Moon

9:40 am

A global map of the rockfalls found on the Moon
Click for full resolution image.

A review of more than two million Lunar Reconnaissance Orbiter (LRO) images of the Moon has allowed scientists to compile the first global map of lunar rockfalls.

The map on the right comes from the paper. From the press release:

The result is a map of the lunar surface between 80 degrees northern and southern latitude that shows 136,610 rockfalls with diameters of more than two and a half meters. “For the first time, this map enables us to systematically analyze the occurrence and causes of rockfalls on another celestial body”, says Dr. Urs Mall from MPS.

Previously, scientists had assumed that lunar quakes in particular were responsible for the displacement of boulders. The new global map of rockfalls indicates that impacts from asteroids may play a much more important role. They are apparently – directly or indirectly – responsible for more than 80 percent of all observed rockfalls.

“Most of the rockfalls are found near crater walls,” says Prof. Dr. Simon Loew of ETH Zurich. Some of the boulders are displaced soon after the impact, others much later. The researchers hypothesize that impacts cause a network of cracks that extend in the underlying bedrock. Parts of the surface can thus become unstable even after very long periods of time.

Though the map suggests vaguely that these rockfalls are more scattered on the lunar farside and more concentrated in the mid-latitudes on the nearside, I suspect this is likely not so. If it is however it reveals something about the Moon that needs to be explained.

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NASA endorsement allows SpaceX to shift focus to Starship

9:25 am

Capitalism in space: Three different news stories today about SpaceX point out strongly the direction in which the company is heading, both in its design focus and in where it will be doing it.

First, SpaceX has informed the Port of Los Angeles that it is now definitely abandoning all plans to establish a Starship manufacturing facility there.

The company made this announcement on March 27th, which means it is not directly related to the tiff that Musk had with Alameda County officials about keeping his Tesla factory open during the California Wuhan panic lock down, which occurred in early May. Nonetheless, this decision, combined with Musk’s May 9th statement that he was going to move Tesla from California, suggests strongly that he and SpaceX is losing patience with California politics, and is likely to increasingly minimize the presence of Musk’s companies there.

This also means that the company will be expanding its Starship operations in both Texas and Florida.

In a second related story, it appears that — with the success of the first manned Dragon mission — Musk now wants SpaceX to shift its development focus entirely to Starship. Prior to that successful Dragon launch, NASA had made it clear that it did not want the company distracted by Starship, and instead stay focused on fixing any issue that might delay Dragon. As NASA is SpaceX’s biggest customer, the company was obliged to comply.

With the Dragon success however SpaceX has completed the job, so Musk now feels free to shift the company’s development teams over to Starship. And NASA is even helping him do this (today’s third SpaceX story) by agreeing at last to permit the company to use reused Falcon 9 rockets and Dragon capsules for future manned missions.

In a wholly unexpected turn of events, a modification to SpaceX’s ~$3.1 billion NASA Commercial Crew Program (CCP) contract was spotted on June 3rd. Without leaving much room for interpretation, the contract tweak states that SpaceX is now “[allowed to reuse] the Falcon 9 launch vehicle and Crew Dragon spacecraft beginning with” its second operational astronaut launch, known as Post Certification Mission-2 (PCM-2) or Crew-2.

NASA in the past was very slow to accept the use of reused capsules and rockets. It now appears they have abandoned this reluctance entirely, so much so that we could even see American astronauts flying into space on a reused rocket and in a reused capsule before the end of the year.

I want to pause to let this fact sink in. SpaceX has turned what what was considered only a few years ago as an absurd, dangerous, and wholly insane idea into the only and right way to do things.

This big endorsement of reusability by NASA also means that the agency is now willing to let SpaceX make its shift to Starship, since refurbishing rockets and capsules does not take the manpower as building new equipment.

Expect the action in Boca Chica to ramp up quite spectacularly this summer.

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Sunspot update: The deep minimum deepens

12:07 pm

NOAA last week did its monthly update of its graph for tracking the monthly activity of sunspots on the Sun’s visible hemisphere. Below is that updated graph, annotated by me to show the past and new solar cycle predictions.

May 2020 sunspot activity

The graph above has been modified to show the predictions of the solar science community for both the previous and upcoming solar maximums. The green curves show the community’s two original predictions from April 2007 for the previous maximum, with half the scientists predicting a very strong maximum and half predicting a weak one. The blue curve is their revised May 2009 prediction. The red curve is the new prediction, first posted by NOAA in April 2020.

Since last month NOAA has done some further revisions to this graph, and improved it significantly since their first redesign, released in April. You can see the difference just by comparing it to my previous update last month. For scales covering longer periods, they have eliminated the diamonds, making the curve much more readable. They have also increased the size of the graph, which also serves to make it more readable as well. Kudos to the people at NOAA for these changes.

As you can see, sunspot activity in May plunged from the slight uptick in April. This is even more clearly shown by the SILSO graph below.
» Read more

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A gun-control Democrat in Chicago calls for defunding the police

10:15 am

At least one Chicago alderman is now demanding that the city defund its police force as her solution to the rioting and looting and gun violence occurring there and nationwide.

She is also clearly in favor of the strict gun control laws in Chicago, which means she, like Democrats in California, New York, Minnesota, and elsewhere, sees the lawbreaker as her base and the ordinary and innocent citizens as her enemy.

UPDATE: It occurred to me that there is another aspect to this story that needs noting. If you go to the link, you will see a video news report that includes an interview of alderman Rodriguez-Sanchez as well an “activist” and a representative of the ACLU, all strongly in favor of defunding the police. Amazingly, the reporter, Will Jones, apparently never once thought to ask any of these individuals about the strange conflict between their desire to defang the police, while maintaining Chicago’s very strict gun control. Tells us a bit about his own biases, or maybe his own lack of depth in thought.

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A Catholic archbishop chooses sides, and picks Trump

9:44 am

This might be a first: A Catholic archbishop, Carlo Maria Viganò, has written a public letter condemning very forcefully the “deep state” and those supporting the riots, the looting, the lockdowns, and the race-baiting of the last few months, and telling Trump he is fighting on the side of the angels.

In society, Mr. President, these two opposing realities co-exist as eternal enemies, just as God and Satan are eternal enemies. And it appears that the children of darkness – whom we may easily identify with the deep state which you wisely oppose and which is fiercely waging war against you in these days – have decided to show their cards, so to speak, by now revealing their plans. They seem to be so certain of already having everything under control that they have laid aside that circumspection that until now had at least partially concealed their true intentions. The investigations already under way will reveal the true responsibility of those who managed the Covid emergency not only in the area of health care but also in politics, the economy, and the media. We will probably find that in this colossal operation of social engineering there are people who have decided the fate of humanity, arrogating to themselves the right to act against the will of citizens and their representatives in the governments of nations.

We will also discover that the riots in these days were provoked by those who, seeing that the virus is inevitably fading and that the social alarm of the pandemic is waning, necessarily have had to provoke civil disturbances, because they would be followed by repression which, although legitimate, could be condemned as an unjustified aggression against the population. The same thing is also happening in Europe, in perfect synchrony. It is quite clear that the use of street protests is instrumental to the purposes of those who would like to see someone elected in the upcoming presidential elections who embodies the goals of the deep state and who expresses those goals faithfully and with conviction. It will not be surprising if, in a few months, we learn once again that hidden behind these acts of vandalism and violence there are those who hope to profit from the dissolution of the social order so as to build a world without freedom: Solve et Coagula, as the Masonic adage teaches. [emphasis in original]

This statement by Viganò is significant in that during the past few elections the Catholic church remained disgustingly neutral, even after it was quite clear that the party of Obama was aggressively working to restrict the freedom of religious people, especially in the context of the homosexual agenda. It was as if the order had gone out from on high that they were not to take any sides politically, either out of fear of losing their tax-free status, or (more likely) because too many powerful church leaders cared not a whit for the principles as outlined in the Bible and were in fact in favor of the left’s agenda.

I wonder if the recent madness related to the Wuhan flu and George Floyd has finally caused the scales to fall from their eyes.

Hat tip Tom Biggar.

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Minneapolis city council will disband police force

4:35 pm

Boy would I be hiring moving vans: The Minneapolis city council today announced at a George Floyd protests that it now has a veto-proof majority determined to disband that city’s police force.

Minneapolis’ left-leaning City Council members on Sunday announced a veto-proof push to disband the Minneapolis police department, ramping up a major conflict inside the city following the death of George Floyd while in police custody.

Many activists have been pushing at least for their cities to defund local police departments, a move many other analysts considered unrealistic. The measure has been the main focus for many people protesting against police brutality.

The city council members spoke at a protest at Powderhorn Park, a neighborhood in Minneapolis. The number of supporters in attendance represented a veto-proof majority to push the measure through, Fox 9 reported.

It appears the council members supporting this measure are all from Minnesota’s version of the Democratic Party, the same party in the state legislature that only three months ago passed bills making it easier to confiscate citizens’ guns and more difficult for citizens to get them.

So, let’s sum up: The Democrats in Minnesota are demanding that citizens be disarmed, while simultaneously working to eliminate any police protection. Sounds like a plan, doesn’t it?

What these policies illustrate is that these Democrats see the ordinary citizen, from all races, as a justified target, and are doing whatever they can to facilitate their murder.

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New data suggests COVID-19 is weakening in deadliness

3:36 pm

New research, as well as impressions from scientists in a number of locations worldwide, is suggesting that the Wuhan flu is becoming with time a less lethal disease, mimicking behavior seen previously with other similar coronaviruses.

[S]everal …American scientists, including some at Arizona State University, announced findings in May that could bolster claims that the virus is less deadly than it once was.

The scientists at ASU said that they had detected a gene deletion in one sample from several hundred Arizona patients that potentially reduced the fitness of the disease. Notably, they claimed it was similar to a deleted sequence observed in the 2003 SARS virus that was observed near the end of that disease’s epidemic—possibly signaling that COVID-19 may be bound for a similar fate.

Those conclusions were echoed by scientists in Spain this week, who proposed that COVID-19 may have adopted what the researchers call a “don’t burn down the house” strategy, “reducing the severity of the infection and tissue damage without losing transmission capability.” In effect, the disease could be opting to become less lethal so that it can spread more easily—a hallmark of evolutionary behavior, and also a boon for anyone who gets infected with the milder strain.

Meanwhile, the evidence continues to suggest that the overall mortality this year is not significantly different than other years, and that the Wuhan flu “isn’t much worse than than a bad seasonal flu.”

Finally, the leftist demonstrations yesterday and today prove that the demands that we social distance, that we wear masks, that we shut down the economy and bankrupt a quarter of the population in order to slow the spread of COVID-19, were all a lie. Suddenly, it’s okay to march down streets in crowds, as long as that crowd is in favor of the bigoted organization Black Lives Matter and opposed to Donald Trump.

But then, it was all a patently obvious lie from the beginning. First we were to social distance for a few weeks to slow the spread (not stop it) so that hospitals would not be overwhelmed. Then we had to close-down all businesses arbitrarily chosen by governors as non-essential (noting that this choice almost never included big corporate chains). Then the lock-downs and social distancing had to be extended, sometimes forever, in order to stop the disease. And then we needed to wear masks everywhere, even though it is clear from the scientific evidence that masks do little while actually increasing the wearer’s health risk.

The moment however the left, which was where most of these demands were coming, had a new cause that required demonstrations and protests, these new “norms” went out the window. At least they are out the window for the next few days, while the George Floyd protests continue. Once those die down, expect the demands to return, and to be applied (as they have so far) selectively, aimed mostly at hurting those the left sees as their enemy.

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Northrop Grumman wins contract to build Gateway habitation module

8:30 am

Capitalism in space: NASA on June 5 awarded Northrop Grumman the contract to design and build the habitation module for the agency’s proposed Lunar Gateway space station.

NASA said it issued a contract to Northrop Grumman valued at $187 million for the Habitation and Logistics Outpost (HALO) module, which will serve as an initial habitat for crews visiting the lunar Gateway. The module, described by NASA as the size of a small studio apartment, will be able to support short stays by crews arriving on Orion spacecraft.

The contract does not cover all the work needed for HALO. Instead, the award announced June 5 funds design of the module through a preliminary design review late this year. The contract also allows Northrop Grumman to issue subcontracts for hardware with long lead times. A contract modification will come later to fund full development and testing of HALO.

And why might that contract only award “design” money? It is because the Lunar Gateway, as far as I know, has still never been approved by Congress. It remains still the dream of NASA and its bureaucrats, now with the political support of the Trump administration (who have fortunately revised and de-emphasized its place within the agency’s entire manned lunar program).

In the end I suspect NASA will get that Congressional approval, but when it does it will signal once again how political power in the U.S. has devolved from elected officials, put their by the citizens of the country to be in charge, to unelected bureaucrats within the military-industrial complex in DC. And I say this recognizing that as revised by the Trump administration, Gateway might actually make some sense now.

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Bennu’s forbidding gravelly surface

11:06 am

Gravelly Osprey landing site on Bennu
Click for a higher resolution version.

On May 26 the OSIRIS-REx science team completed their first rehearsal and close approach to their back-up sample-grab-and-go site on Bennu, dubbed Osprey, getting as close as 820 feet. The image to the right, cropped and reduced to post here, shows that sample site within the white box. According to the image caption, the “long, light-colored boulder to the left of the dark patch, named Strix Saxum, is 17 ft (5.2 m) in length.” Note also that they have rotated the image so that east is at the top in order to make it more easily viewed.

This particular spot in this crater is actually a revision from their first choice from early in 2019, which originally was to the right and below the dark patch in the center of the crater. After six months of study, they decided instead on the present target area above the dark patch, because it seemed safer with the most sampleable material.

So how safe is this new location? Let’s take a closer look.
» Read more

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An exposed dry waterfall on Mars

2:35 pm

An exposed dry waterfall on Mars
Click for full image.

Close overview map

Wide overview map

Cool image time! The photo to the right, cropped and reduced to post here, was taken on April 30, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Uncaptioned, the science team titled the release as a “Cataract in Osuga Valles.”

To understand what we are looking at it is necessary to also see a wider view, as provided by the context map below and to the right. As you can see, this image straddles across the canyon called Osuga Valles, and heads downstream to the east. It also shows a point where the grade of that canyon suddenly drops. If water ever flowed here this place would have been the location of a truly spectacular waterfall.

More likely, these cataracts mark the location where sometime in the past a glacier had flowed down this valley, cutting a path until it broke out into the large and wide dead end area that appears to have no clear outlet. For some reason at this point the downhill grade of this canyon suddenly dropped, with the glacier following that sudden steep drop.

There is no glaciers here now, as this location is at 14 degrees south latitude, too close to the equator for any ice to remain close to the surface. Instead, dust dunes remain as the only feature flowing down through these cataracts.

The second overview map provides further context, showing the location of Osuga Valles relative to nearby Valles Marineris, the largest known canyon system in the solar system. Whatever process formed that gigantic canyon system certainly was a factor in forming Osuga Valles. The details however are not yet understood with any certainty. All we presently have are theories.

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InSight mole team reports some digging success

11:58 am

InSight scoop pushing against mole as it digs
Click to watch movie.

A new strategy devised in February to use the scoop on the Mars InSight lander to push down on the mole digging tool so that it could gain traction and dig downward has apparently had some success.

We started about seven centimetres above the surface on Sol 458 (11 March) and we are now at the surface with the scoop on Sol 536 (30 May 30), after six cycles of hammering over 11 weeks.

If you click on the image on the right you can see a movie assembled from images taken since February as they pushed down. The mole has clearly descended into the Martian soil about seven centimeters, or about three inches. The issue now, as shown in the movie, is that the mole is now deep enough that the scoop is pressed against the ground. It can’t really push down anymore on the mole, at least in this configuration.

They have the option of using the scoop’s tip to push farther into the ground, but that involves some risk. First they plan to let the mole continue to dig, without the scoop’s help, in the hope that it is now finally deep enough into the ground that the ground is finally able to provide the friction required to hold the mole in place. If this doesn’t work, they will then try using the scoop to fill the hole up to provide more friction.

If that doesn’t work, they will then try using the scoop tip to provide the added pressure.

All in all, it does appear there is now hope that the mole will eventually get the heat sensor for measuring the internal temperatue on Mars deep enough to do its primary mission. Stay tuned!

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Rethinking the theories that explain some supernovae

10:30 am

The uncertainty of science: New data now suggests that the previous consensus among astronomers that type Ia supernovae were caused by the interaction of a large red giant star with a white dwarf might be wrong, and that instead the explosion might be triggered by two white dwarfs.

If this new origin theory turns out to be correct, then it might also throw a big wrench into the theory of dark energy.

The evidence that twin white dwarfs drive most, if not all, type Ia supernovae, which account for about 20% of the supernova blasts in the Milky Way, “is more and more overwhelming,” says Dan Maoz, director of Tel Aviv University’s Wise Observatory, which tracks fast-changing phenomena such as supernovae. He says the classic scenario of a white dwarf paired with a large star such as a red giant “doesn’t happen in nature, or quite rarely.”

Which picture prevails has impacts across astronomy: Type Ia supernovae play a vital role in cosmic chemical manufacturing, forging in their fireballs most of the iron and other metals that pervade the universe. The explosions also serve as “standard candles,” assumed to shine with a predictable brightness. Their brightness as seen from Earth provides a cosmic yardstick, used among other things to discover “dark energy,” the unknown force that is accelerating the expansion of the universe. If type Ia supernovae originate as paired white dwarfs, their brightness might not be as consistent as was thought—and they might be less reliable as standard candles.

If type Ia supernovae are not reliable standard candles, then the entire Nobel Prize results that discovered dark energy in the late 1990s are junk, the evidence used to discover it simply unreliable. Dark energy might simply not exist.

What galls me about this possibility is that it was always the case. The certainty in the 1990s about using type Ia supernovae as a standard candle to determine distance was entirely unjustified. Even now astronomers do not really know what causes these explosions. To even consider them to always exhibit the same energy release was just not reasonable.

And yet astronomers in the 1990s did, and thus they fostered the theory of dark energy upon us — that the universe’s expansion was accelerating over vast distances — while winning Nobel Prizes. They still might be right, and dark energy might exist, but it was never very certain, and still is not.

Much of the fault in this does not lie with the astronomers, but with the press, which always likes to sell new theories as a certainty, scoffing over the doubts and areas of ignorance that make the theories questionable. This is just one more example of this, of which I can cite many examples, the worst of all being the reporting about global warming.

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Exoplanet in Earth-like orbit circling Sun-type star

9:54 am

Worlds without end: Astronomers have found evidence suggesting the existence of an exoplanet about twice as massive as the Earth and orbiting a solar-twin star in an orbit almost the same as the Earth’s.

The star, Kepler-160, is about 3,000 light years away, and had previously discovered to have two exoplanets.

“Our analysis suggests that Kepler-160 is orbited not by two but by a total of four planets,” Heller summarizes the new study. One of the two planets that Heller and his colleagues found is Kepler-160d, the previously suspected planet responsible for the distorted orbit of Kepler-160c. Kepler-160d does not show any transits in the light curve of the star and so it has been confirmed indirectly. The other planet, formally a planet candidate, is KOI-456.04, probably a transiting planet with a radius of 1.9 Earth radii and an orbital period of 378 days. Given its Sun-like host star, the very Earth-like orbital period results in a very Earth-like insolation from the star – both in terms of the amount of the light received and in terms of the light color. Light from Kepler-160 is visible light very much like sunlight. All things considered, KOI-456.04 sits in a region of the stellar habitable zone – the distance range around a star admitting liquid surface water on an Earth-like planet – that is comparable to the Earth’s position around the Sun.

“KOI-456.01 is relatively large compared to many other planets that are considered potentially habitable. But it’s the combination of this less-than-double the size of the Earth planet and its solar type host star that make it so special and familiar,” Heller clarifies. As a consequence, the surface conditions on KOI-456.04 could be similar to those known on Earth, provided its atmosphere is not too massive and non-Earth-like. The amount of light received from its host star is about 93 percent of the sunlight received on Earth. If KOI-456.04 has a mostly inert atmosphere with a mild Earth-like greenhouse effect, then its surface temperature would be +5 degrees Celsius on average, which is about ten degrees lower than the Earth’s mean global temperature.

These results have many uncertainties, so we should not be surprised if further research produces significant revisions in these conclusions. Nonetheless, the number of Earth-like planets orbiting Sun-like stars in orbits like the Earth’s continues to rise.

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A detailed update on SpaceX’s Starlink satellite constellation

9:41 am

Link here. With yesterday’s launch, SpaceX now has put 420 satellites in orbit.

In a recent interview with Aviation Week, SpaceX President Gwynne Shotwell said that they should begin beta testing the network this year and would want to complete around 14 launches before publicly promoting Starlink service. That could allow service to begin as soon as early 2021 depending on how fast launches can be performed.

In a recent ITU filing, SpaceX laid out a very aggressive schedule for continuing the Starlink deployment, with 13 launches in the May to September time period. This schedule is likely to spread out a bit as they run into normal launch cadence issues such as weather, range coordination, booster recovery operations, and booster refurbishment.

The first launch in that group (June 3 in Florida) has been delayed nearly a month for the above reasons. Regardless of exactly how long those launches end up taking, Ms. Shotwell’s comments indicate SpaceX doesn’t think satellite production will be a gating factor for their deployments in the near future.

An interesting feature of the schedule is that after this frenzy of launches, there would be a gap with only one launch in four months, followed by a period of twice-monthly launches to finish out the initial 1584 satellite shell of the constellation. SpaceX may have options to make changes to the satellites during that pause in the deployments, such as adding the optical inter-satellite links that have been mentioned as debuting later in 2020.

The article then provides a great deal of information about the system’s design and status for beginning operations in the U.S. Well worth a close read.

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