Tag: spaceflight

Amazon releases more details about proposed Kuiper satellite constellation

8:58 am

Capitalism in space: Amazon on July 4 submitted to federal regulators a more detailed description of its proposed 3,000+ Kuiper satellite constellation.

Amazon’s Kuiper System satellites will have a design life seven years — less than half that of a traditional geostationary communications satellite — and will be launched in five waves, according to a July 4 filing with the U.S. Federal Communications Commission.

The first wave consists of 578 satellites that would provide internet service in two horizontal coverage bands, one between 39 degrees north and 56 degrees north (roughly from Philadelphia north to Moscow) and another from 39 degrees south down to 56 degrees south (roughly from Hastings, New Zealand, to the top of Great Britain’s South Sandwich Islands in the Atlantic Ocean). The subsequent four waves would fill in coverage to the equator.

Amazon didn’t say when those satellites would launch or what launch vehicle they would use to reach orbit. Jeff Bezos, the founder of Amazon, also owns launch company Blue Origin, whose New Glenn orbital rocket is slated for a first launch in 2021.

If Amazon intends to use Bezos’ New Glenn rocket, this system cannot launch prior to 2021, at the earliest, and that means it will likely enter the internet competition with SpaceX and OneWeb late. This is not fatal for Amazon, but it will require them to offer something to their customers that will draw them away from the earlier constellations.

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Fire at SpaceX Starhopper facility in Florida

8:49 am

A fire in SpaceX’s Florida facility yesterday, where it is building a Starship prototype, caused between $50,000 to $100,000 damages.

City spokesperson Yvonne Martinez confirmed a small fire broke out at the facility on Cidco Road around noon and that the Cocoa Fire Department was able to quickly extinguish it. She said crews suspected an electrical fault as the source of the fire.

“This afternoon, a small fire occurred at a SpaceX facility in Cocoa,” SpaceX spokesperson James Gleeson told FLORIDA TODAY. “The fire was contained to a sea van on site and extinguished thanks to the Cocoa Fire Department, which responded within minutes.”

“There were no injuries as a result of the fire, and the cause is under investigation,” he said.

Martinez said the fire department estimates about $50,000 to $100,000 in damages were sustained by the shipping container and equipment inside, as well as the adjacent building.

This will be a blow to the Florida SpaceX unit that is competing with the Boca Chica unit on the construction of Starship.

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Branson sells 49% of Virgin Galactic, stock to be publicly listed

8:24 am

Capitalism in space: Richard Branson has sold 49% of Virgin Galactic in a deal that will have the company’s stock publicly listed by the end of 2019.

The firm will list its shares as part of a merger deal with Social Capital Hedosophia, a special-purpose acquisition company (SPAC) created by venture capitalist Chamath Palihapitiya. Social Capital Hedosophia, formed by Palihapitiya’s Social Capital and venture capital firm Hedosophia in 2017, will invest $800 million for a 49% stake in the combined company. The firm will have an enterprise value of $1.5 billion, Virgin Galactic said.

…Branson’s space venture would be the first publicly-listed human spaceflight firm, with the stock market listing slated to take place in the second half of 2019.

Branson had been in talks with Palihapitiya since he suspended talks over a Saudi investment in his space companies last year. Riyadh had planned to invest a total of $1 billion into Virgin Galactic and Virgin Orbit, which focuses on small satellites, but the deal fell through over the murder of journalist Jamal Khashoggi.

Branson was the person who said the Saudis backed out because of Khashoggi, but I personally do not believe that story. What I think happened was that, after 15 years of empty promises and no tourist flights, the Saudis suddenly realized that Virgin Galactic was a bad investment, and backed out. Branson now needs cash to keep the company afloat.

I am honestly unfamiliar with the ways of Wall Street. I do not know whether being “publicly listed” means the stock will be available for trade. If so, I expect the stock value to quickly plunge.

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Reused Falcon 9 wins NASA launch contract instead of Pegasus

10:04 pm

Captalism in space: NASA has awarded SpaceX a Falcon 9 launch contract using a reused first stage for its next X-ray telescope, the Imaging X-ray Polarimetry Explorer (IXPE)..

SpaceX will charge NASA just over $50 million, its normal price for a reused Falcon 9 and significantly less than NASA has previously paid for this kind of launch. More important, the telescope had been designed with the expectation that it would be launched using Northrop Grumman’s Pegasus rocket. It appears NASA had instead decided to bypass Pegasus, partly because it probably costs more, and partly because there is some issue with Pegasus that has delayed the launch of NASA’s ICON since 2017.

In fact, that ICON launch is the only contract that Pegasus presently has, and it is charging NASA $56 million for that launch, with NASA also having to bear the additional costs associated with the delays caused by Pegasus. All these issues, plus the loss of the IXPE launch, strongly suggests that Pegasus is in big trouble. It does not appear that, as it is presently being marketed, it is able to garner any business.

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Engineers adjust Voyagers 1 & 2 because of steadily dropping power

6:35 pm

In recognition that the available power on both Voyager 1 and Voyager 2 continues to drop due to the age of the spacecraft, engineers have decided to make some major changes in how they operate both spacecraft.

For example, to save power on Voyager 2 they have turned off the heaters for the instrument that confirmed last year that the spacecraft had entered interstellar space. Even so, the instrument is still functioning and sending back data. It is expected it will continue to work for some time before finally succumbing to the cold of deep space.

They have also decided to reactivate the back-up thrusters on Voyager 2, just as they did with Voyager 1 in 2017.

Another challenge that engineers have faced is managing the degradation of some of the spacecraft thrusters, which fire in tiny pulses, or puffs, to subtly rotate the spacecraft. This became an issue in 2017, when mission controllers noticed that a set of thrusters on Voyager 1 needed to give off more puffs to keep the spacecraft’s antenna pointed at Earth. To make sure the spacecraft could continue to maintain proper orientation, the team fired up another set of thrusters on Voyager 1 that hadn’t been used in 37 years.

Voyager 2’s current thrusters have started to degrade, too. Mission managers have decided to make the same thruster switch on that probe this month. Voyager 2 last used these thrusters (known as trajectory correction maneuver thrusters) during its encounter with Neptune in 1989.

It is thirty years since those thusters on Voyager 2’s were used. If they work it will be an incredible testament to the engineers who designed both spacecraft.

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UCLA professor found guilty of stealing military technology for China

9:41 am

A UCLA professor has been found guilty of stealing military technology and sending it to China.

UCLA adjunct professor Yi-Chi Shih was convicted June 26 on 18 federal charges, Newsweek reported, and could now lose hundreds of thousands of dollars, while also facing up to 219 years behind bars for numerous violations of the law. These include conspiracy to break the International Emergency Economic Powers Act (IEEPA), committing mail and wire fraud, lying to a government agency, subscribing to a false tax return, and conspiring to gain unauthorized access to information on a protected computer, according to a Department of Justice news release.

Shih and co-defendant Kiet Ahn Mai tried to access illegally a protected computer owned by a U.S. company that manufactured semiconductor chips called monolithic microwave integrated circuits (MMICs). MMICs are used by the Air Force and Navy in fighter jets, missiles and missile guidance technology, and electronic military defense systems.

The chips were exported to Chengdu GaStone Technology Company (CGTC), a Chinese company, without a required Department of Commerce license. Shih previously served as the president of CGTC, which made the Commerce Department’s Entity List in 2014 “due to its involvement in activities contrary to the national security and foreign policy interest of the United States – specifically, that it had been involved in the illicit procurement of commodities and items for unauthorized military end use in China,” according to court documents cited by the DOJ.

The only surprise here is that the these guys got caught. Since the late 1990s China has been making aggressive effort to steal American know-how, and has largely been successful. The visible result of that effort has been their space program, almost all of which began with technology thefts.

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Hayabusa’s 2nd sample grab on Ryugu

8:11 am

Target 2nd landing site on Ryugu
Click for full resolution image.

The Hayabusa-2 science team today posted detailed information in two posts about the process that led to the decision to attempt a second touch-and-go sample grab on the surface of Ryugu. The first part outlined in detail what they have learned about the target landing site. The second part described the decision making process.

The image to the right, reduced to post here, is from the second part. It shows the crater they created with a projectile and the target landing site, labeled C01-C. The dark areas show the changes on the surface following the impact. Their analysis of the target site found that, first, they can land there without undue risk to the spacecraft, and, second, they have a high probability of getting ejecta thrown up from the crater in their sample.

Based on all this information, they decided to attempt it, on July 11. I especially like how they stated this decision:

The second touchdown will be attempted on July 11. We will proceed with our mission with care, but boldly go. [emphasis mine]

I am sure my readers will recognize the literary reference.

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Man who wanted to be the first African in space killed in road accident

7:40 am

A South African man who had won a competition to fly on a suborbital tourist flight has been killed in a motorcycle accident.

Mandla Maseko, 30, was killed on Saturday, a family statement says.

In 2013, the South African Air Force member beat one million entrants to win one of 23 places at a space academy in the US. Nicknamed Afronaut and Spaceboy, Maseko described himself as a typical township boy from Pretoria.

…He had spent a week at the Kennedy Space Centre in Florida doing tests in preparation for an hour-long sub-orbital flight, originally scheduled for 2015. Challenges included skydiving to earth from 10,000 feet and a test charmingly known as the “vomit comet”.

But the chance never came to go into space. The company organising the flight, XCOR Aerospace, went bankrupt in 2017, news site Space.com reported.

All around a terrible tragedy.

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DSCOVR in safe mode

9:25 am

The solar wind monitoring satellite DSCOVR has gone into safe mode.

It is at present unclear what the problem is, or whether they can recover the spacecraft.

DSCOVR’s history is packed with political shenanigans. It was first proposed by Gore as Triana, with its only purpose to take global pictures of the Earth so Gore and the left could use these images for environmental propaganda. Bush canceled it, partly because it really had no legitimate scientific purpose and partly to prevent the left this propaganda tool. It was resurrected during the Obama administration but with a more useful purpose, providing early solar wind data so that Earth-based power grids could get prepared should a major solar storm be incoming. NASA’s other solar wind monitors ACE and SOHO, were already decades beyond their planned lifespan, and the space agency, the solar weather community, and especially the world’s electrical power industry, was desperate to get a new satellite in space.

Ironically, with DSCOVR’s shutdown we are still dependent on ACE and SOHO. Nor is there any replacement satellite anywhere close to launch.

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X-37B photographed in orbit

2:17 pm

X-37B as seen by telescope
Click for full image.

An amateur astronomer this week was able to get a photograph of the X-37B presently in orbit about 200 miles high.

The [X-37B] is a small version of the classic Space Shuttle, it is really a small object, even at only 300 km altitude, so dont expect the detail level of ground based images of the real Space Shuttle. Considering this, the attached images succeeded beyond expectations. We can recognize a bit of the nose, Payload Bay and tail of this mini-shuttle with even a sign of some smaller detail.

The image on the right, reduced and cropped to post here, shows the image with a graphic of the spacecraft in comparison.

The graphic assumes the X-37B’s cargo door is open, but the actual image does not match this, to my eye. Instead, it appears partly open, with some kind of large object protruding from the cargo bay.

This X-37B spacecraft, one of two the Air Force flies, was launched by SpaceX in September 2017 and has now been in space more than 664 days, with no indication yet when it will return to Earth. The present record is 718 days for the longest X-37B flight, set by the Air Force’s other X-37B. It appears likely that this spacecraft will exceed that record.

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Russian Soyuz rocket successfully launches 33 satellites into orbit

10:56 pm

In its first Vostochny launch in 2019, Russia today used its Soyuz rocket to successfully launch a variety of weather, engineering, and Earth observation satellites totaling 33 into orbit.

As I write this the satellites are in orbit but have not yet been deployed by the rocket’s Fregat upper stage, a process that will take several hours as it moves them into a variety of orbits.

Many of the smaller satellites on this rockets are commercial cubesats, and are Russia’s effort to regain some of its lost commercial business that had been captured by SpaceX. They are also a sign of the changing launch business. Previously Russia’s commercial flights were all on its larger Proton rocket because the satellites were larger. Now the business is shifting to the smaller and recently more reliable Soyuz, because smaller satellites are beginning to dominate the industry.

The leaders in the 2019 launch race:

9 China
8 SpaceX
6 Russia
5 Europe (Arianespace)
3 India
3 Rocket Lab

The U.S. continues to lead China 14 to 9 in the national rankings.

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Jupiter’s changing Great Red Spot

12:53 pm

The changing Great Red Spot
Click for full resolution image.

Using Juno images produced during four different orbits, beginning in July 2017 through February 2019, citizen scientist Björn Jónsson has created a montage, reduced in resolution to post on the right, that shows the changes that have occurred in Jupiter’s Great Red Spot during that time. As he writes,

This is a montage of four map-projected [Spot] mosaics processed from images obtained during these perijoves (at the time of this writing perijove 20 is the most recent perijove). The mosaics show how the [Spot] and nearby areas have changed over the course of the Juno mission. The mosaics cover planetographic latitudes 4.7 to 38 degrees south.

The resolution of the source data is highly variable and this can be seen in some of the mosaics. The viewing geometry also varies a lot. Some of the images were obtained almost directly above the [Spot] (in particular some of the perijove 7 images) whereas other images were obtained at an oblique viewing angle (in particular the perijove 17 images).

These are approximately true color/contrast mosaics but there may be some inaccuracies in areas where the original images were obtained at a highly oblique angle. The contrast is also lower in these areas.

What strikes me the most is how the Spot itself seems relatively unchanged, while the bands and surrounding cloud formations changed significantly during this time.

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Update on planned Russian additions to ISS

8:54 am

Link here. The article describes present status of Russia’s new modules to ISS, along with their tentative launch dates in the early 2020s.

We should not take these dates too seriously. Russia is literally decades behind schedule in launching this stuff. Whether they can finally get them in orbit now, with their present shortage in cash, remains unknown.

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A journey to Saturn’s moon Dione

1:08 pm

Global Map of Dione

Cool image time! Today, for a change, I decided to spend some time rummaging through the Cassini raw image archive, mainly because I wanted to see some variety. At this time sadly almost all the good images coming from space are limited to Mars images, and I wished to post a cool image from somewhere else in the solar system.

The global map above was compiled from photographs of the Saturn moon Dione taken by Cassini during its thirteen years in orbit around the ringed giant.

The orange box indicates the sector of interest. The white outline indicates the location of the next photograph below and to the right, taken by Cassini during its first close fly-by of the moon on October 11, 2005, when the spacecraft was approaching the moon.
» Read more

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Apollo landing tapes for sale

9:42 am

An intern who in 1976 purchased more than a thousand surplus 2-inch videotapes from NASA for $218 is now going to auction off three of those reels that show the Apollo 11 moon walk.

Back in 1976, NASA gave 1,150 reels of 2-inch Quadruplex videotape to a government surplus auction. Gary George, a former intern at NASA’s Johnson Space Center, snapped up the lot of them for $218, in the hopes of selling them to news stations to record over for $50 a pop. He never watched them, but because his dad was a space buff, kept three of the tapes marked as “Apollo 11 EVA” (aka Extravehicular Activity, better known as a spacewalk). When he eventually watched the tapes, he realized that he had one of three surviving copies of one of the greatest feats of human ingenuity, the July 20, 1969 Moon landing. Now, those videotapes will be auctioned off to the highest bidder when Sotheby’s will mark the 50th anniversary of the moon landing by putting the tapes up for sale on July 20th, at a starting bid of $700,000.

“I had no idea there was anything of value on them,” George said in an interview with Reuters. He started to get suspicious in 2006, after NASA admitted they had lost the tapes, and believed they could have been in the 2,614 boxes of Apollo mission tapes that were sent to a storage facility in late 1969. George got in touch with video archivist David Crosthwait in California, who had the necessary equipment to view the vintage tapes. In December 2008, George played the reels and quickly realized what he had been storing over the last few decades. He contacted NASA about the reels but “an agreement could not be reached,” according to the auction listing, and off to the auction block they go as part of an auction dedicated to Space Exploration.

The saddest part of this story are the tapes George sold to television stations to use to back-up their daily broadcasts. Some of those tapes probably contained historical recordings of the Apollo missions. While I suspect these tapes were not NASA’s only copies, I cannot be sure, which means some of the source material for the Apollo missions was likely lost.

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Astronomers map exoplanet atmosphere of super-Earth

9:26 am

Worlds without end: Using both the Hubble and Spitzer space telescopes, astronomers have characterized the atmosphere of an exoplanet with a mass between that of the Earth and Neptune.

Astronomers enlisted the combined multi-wavelength capabilities NASA’s Hubble snd Spitzer space telescopes to do a first-of-a-kind study of GJ 3470 b’s atmosphere. This was accomplished by measuring the absorption of starlight as the planet passed in front of its star (transit) and the loss of reflected light from the planet as it passed behind the star (eclipse). All totaled, the space telescopes observed 12 transits and 20 eclipses. The science of analyzing chemical fingerprints based on light is called “spectroscopy.”

“For the first time we have a spectroscopic signature of such a world,” said Benneke. But he is at a loss for classification: Should it be called a “super-Earth” or “sub-Neptune?” Or perhaps something else?

Fortuitously, the atmosphere of GJ 3470 b turned out to be mostly clear, with only thin hazes, enabling the scientists to probe deep into the atmosphere. “We expected an atmosphere strongly enriched in heavier elements like oxygen and carbon which are forming abundant water vapor and methane gas, similar to what we see on Neptune”, said Benneke. “Instead, we found an atmosphere that is so poor in heavy elements that its composition resembles the hydrogen/helium rich composition of the Sun.”

To me, our knowledge of exoplanets today is beginning to resemble our knowledge of the planets in the solar system c. 1950. The little data we have gives us a vague idea of what’s there, but there are so many gaps and uncertainties that no one should be confident about drawing any firm conclusions.

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Roscosmos creates new design bureau to build reusable rocket

9:16 am

The Russian bureaucracy marches on! Roscosmos has formed a new design bureau, dubbed Bartini after Italian-born Soviet-era aircraft designer Robert Bartini, to build a new reusable rocket

The article says this rocket will be “based on the preliminary design of the Krylo-SV (Wing) project.” I cannot find any references anywhere for such a project, though this webpage notes that a test pilot for the Soviet Buran shuttle worked in 1999 for a “Krylo Company.” I suspect this was one of the many failed attempts to form a private space company after the fall of the Soviet Union, and it had produced designs for a reusable winged spacecraft, which is why that test pilot had worked for them. (It likely failed because the big already existing organizations in Russia teamed up with the government to squelch this new competition.)

Regardless, it appears that Russia is going to dust off those plans. Note that this new organization is a top-down creation, not a new independent company. I expect therefore that its biggest goal is to provide jobs. Whether it gets much built is another story.

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ExoMars 2020 parachutes damaged during test

9:02 am

Bad news: The parachutes for the European/Russian ExoMars 2020 mission were damaged during a parachute test.

A May 28 test of the parachute system used a high-altitude balloon above the Swedish Space Corporation’s Esrange test site in northern Sweden. The test was intended to demonstrate the end-to-end performance of the entire system, including both the pilot and main chutes as well as the mortars used to extract the pilot chutes.

ESA said that the first main parachute suffered several radial tears in its fabric, all occurring before reaching its maximum load. The second main parachute also suffered a single tear, also before peak loading.

The other parts of the parachute system worked as expected, and ESA said “a good level of the expected aerodynamic drag was nevertheless achieved” despite the damage sustained by the parachutes. However, the agency acknowledged that the problem needs to be understood and corrected prior to the mission’s launch in one year.

They can easily get the parachutes repaired before the July 2020 launch. The problem is figuring out what caused the damage and fixing that in the time left. They already had planned two more parachute tests, but these cannot happen prior to all the fixes, and then they have to work.

Considering that they will only assemble the spacecraft at the end of this year, I am increasingly thinking that ExoMars 2020 will not launch in 2020. And if it does, I will not be surprised if it turns out to be a failure.

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LightSail 2 released from cubesat; establishes contact

9:58 pm

The Planetary Society’s LightSail-2 technology demonstration satellite was released from its carrier vehicle today and successfully established communications with the ground.

The CubeSat, about the size of a loaf of bread, was scheduled to leave Prox-1 precisely 7 days after both spacecraft successfully flew to orbit aboard a SpaceX Falcon Heavy rocket. Following deployment from its spring-loaded enclosure known as a P-POD, LightSail 2 deployed its radio antenna and began transmitting health and status data, as well as a morse code beacon indicating its call sign. The mission team received LightSail 2’s first signals on 2 July at 01:34 PDT (08:34 UTC), as the spacecraft passed over Cal Poly.

…The team will spend about a week checking out LightSail 2’s systems, exercising the spacecraft’s momentum wheel, and taking camera test images before and after deployment of the CubeSat’s dual-sided solar panels. Following the successful completion of these tests, the team will deploy the 32-square-meter solar sail, about the size of a boxing ring. A time for the solar sail deployment attempt will be announced later.

If they successfully deploy the solar sail and use it to maneuver in space, it will the second time the Planetary Society has done it, having deployed LightSail-1 in 2015. That mission has some communications problems, but eventually succeeded in its main engineering mission by testing the sail deployment system.

LightSail-2 will also be the third time a light sail has been flown in space, with the first, Ikaros, deployed by the Japanese in 2010 and flown in solar orbit through 2012. That mission was successful in using sunlight to accelerate the sail.

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The Martian seabed?

2:24 pm

Cones and strange blobs
Click for full image.

Cool image time! Above is an image taken by the high resolution camera of Mars Reconnaissance Orbiter (MRO) in November 2018 of an area in the vast relatively featureless northern lowlands of Mars. I have rotated, cropped, and reduced it to post here.

I have also indicated two sections, indicated by the white boxes, that I have cropped out of the full resolution image to highlight some interesting features. Both images can be seen in full resolution below.

While the northern lowlands seem featureless from a distance, with few craters, a closer look always reveals many things that are both baffling and fascinating. In this case the region is called Galaxias Colles, a region of mesas and knobby hills. This particular image was dubbed “Cones in Galaxias Colles,” and was clearly taken to get a better look at these strange blobby features.
» Read more

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India hires Russia to train its astronauts

8:51 am

The new colonial movement: India’s space agency ISRO has hired the Russians to train its astronauts for its first home-built manned mission, Gaganyaan, presently scheduled to fly in 2022.

This decision makes a lot of sense. First, the space programs of Russia and India have cooperated a lot in the past, with Russia launch India’s first astronaut on a Soyuz in 1984. Second, Russia has a great deal of experience training new astronauts from other countries, including tourists. Third, neither of the other countries with manned programs, the U.S. and China, have established systems for this kind of training. China has never training any outsiders, and NASA’s systems for this are not designed for efficiency. Moreover, it has been eight years since the U.S. put anyone in space. If I was India I would prefer using someone with recent experience.

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SLS abort test for Orion successful

8:44 am

The second launch abort test of NASA’s SLS/Orion rocket/capsule was successfully completed today.

I have embedded video of the test below the fold. The goal was to test the system that will safely separate the capsule from a failing rocket, which is why no parachutes released to gently bring the capsule back to Earth.

Ascent Abort-2 (AA-2) intentionally runs that emergency abort sequence. Three motors in the LAS fired in that short sequence of a few seconds and then the test was essentially over before the three minutes was up while the hardware was airborne.

NASA and its Orion contractor team recorded test data from real-time telemetry and in onboard data recorders, but the major hardware for the test fell into the ocean. A set of a dozen data recorders were ejected from the Crew Module test article for recovery before it hit the water and sunk.

Why they couldn’t also test the parachutes the same time illustrates the wasteful manner in which SLS/Orion is managed. Moreover, this test was the second for this rocket/capsule, with the first occurring nine years ago, in May 2010. As I have noted,

We fought and won World War II in about a third of that amount of time. The Civil War took about half that time. In fact, it took SpaceX less time to conceive, design, and launch the Falcon Heavy.

Any project that takes this long to accomplish anything is a fraud. It indicates that the goal of SLS/Orion is not to build and fly a manned capsule, but to suck money from the taxpayer for as long as possible.

» Read more

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Comparing today’s modern rocket engines

10:17 pm

For the geeks among us, below the fold is a really really good video describing the engineering designs and considerations that have gone into the launch industry’s most important rocket engines, both now and in the future, with the goal of understanding the design choices SpaceX made for its Raptor engine.

The video is almost 50 minutes long, but if you set the speed at 1.25 you can still understand it and save some time.

Hat tip reader Michael Nelson.
» Read more

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Astronomers declare: Oumuamua was not an alien spacecraft!

7:36 pm

The uncertainty of science: An international team of astronomers have announced that after much consultation and discussion it is their conclusion that the interstellar object Oumuamua that zipped through the solar system in 2017 was a natural object, not an alien spacecraft.

[A] review of all the available evidence by an international team of 14 experts strongly suggests that ʻOumuamua has a purely natural origin. The research team reported their findings in the July 1, 2019, issue of the journal Nature Astronomy.

“We have never seen anything like ʻOumuamua in our solar system,” said Dr. Matthew Knight, the team leader from the University of Maryland “but our preference is to stick with analogs we know, unless or until we find something unique. The alien spacecraft hypothesis is a fun idea, but our analysis suggests there is a whole host of natural phenomena that could explain it.”

It is perfectly reasonable for these scientists to choose the simplest and most likely explanation for Oumuamua, which would be a natural object. Moreover, their conclusion does fit the data we have reasonable well.

At the same time, for anyone to assume there is any certainty to this conclusion would be a grave mistake. It is merely the best guess, based on the available but somewhat limited data. The data however does not preclude more exotic explanations. Nothing is certain.

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Where are the caves on Mars?

9:16 am

Overview map of pits near Arsia Mons

Each month I go through the monthly download of new images from the high resolution camera on Mars Reconnaissance Orbiter (MRO). And each month since November I have found a bunch of newly discovered pits photographed in the region around the volcano Arsia Mons (see: November 12, 2018, January 30, 2019, February 22, 2019, April 2, 2019, and May 7, 2019). The map on the right has been updated to include all those previous pits, indicated by the black boxes, with the new pits from June shown by the numbered white boxes.

To the right are the first three pits in the June archive, with the link to each image site found here (#1), here (#2), and here (#3).

Pits 1 through 3
For full images: Number 1, Number 2, Number 3.

All three are what the scientists doing this research call Atypical Pit Craters:

These Atypical Pit Craters (APCs) generally have sharp and distinct rims, vertical or overhanging walls that extend down to their floors, surface diameters of ~50–350 m, and high depth to diameter (d/D) ratios that are usually greater than 0.3 (which is an upper range value for impacts and bowl-shaped pit craters) and can exceed values of 1.8. Observations by the Mars Odyssey Thermal Emission Imaging System (THEMIS) show that APC floor temperatures are warmer at night and fluctuate with much lower diurnal amplitudes than nearby surfaces or adjacent bowl-shaped pit craters.

The fourth pit, shown in the reduced and cropped image below, might actually be the most interesting of the June lot.
» Read more

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Exos suborbital reusable rocket aborts prematurely during third launch

10:07 pm

Capitalism in space: The third flight of Exos Aerospace’s reusable suborbital rocket SARGE was cut short today shortly after launch when the rocket had attitude control problems.

A reusable suborbital rocket developed by Exos Aerospace suffered a loss of attitude control seconds after liftoff on a test flight June 29, but the rocket was still able to glide safely back to Earth.

Exos’ Suborbital Autonomous Rocket with GuidancE, or SARGE, rocket lifted off from Spaceport America in New Mexico at about 2 p.m. Eastern. In the company’s webcast, the rocket started gyrating seconds after liftoff before disappearing from view.

Controllers were able to reestablish some control of the rocket, aborting the flight. The rocket deployed a drogue parachute and parafoil while venting unused propellant. The rocket slowly descended under that parafoil, landing within view of the launch pad 14 minutes after liftoff.

That it appears they were able to safely recover the rocket and its payloads is significant, even though this failure is a setback for the company.

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Insight engineers get first look at hole

4:46 pm

InSight Mole hole
Click for full image.

The Insight engineering team has successfully lifted the mole structure allowing them to see the hole the mole was pounding into the Martian ground in their effort to diagnose why the mole has been unable to drill more than a foot or so down.

The image to the right shows the mole, the white tubelike structure, inside the hole. As noted by Instrument Lead Tilman Spohn,

I along with others from the team were a bit shocked when we saw how large the pit actually is. Its diameter is about two times the diameter of the mole. The bottom of the pit is difficult to see (we expect better images once the lift is complete) but it seems that it is about 2-2.5 mole diameters deep. A mole diameter is 27mm. So the mole must have compacted the regolith quite a bit. In addition to its own volume it must have displaced about half of its buried volume.

There seems to be a little rim surrounding the pit but most of the displacement likely was compaction. We cannot see the inclination of the wall very well but it at least seems to me that the mole was “precessing” (like a spinning top) and carved a conical hole. This is consistent with the recordings of our tiltmeter STATIL during the hammering in March. We will have to wait for better images to confirm or disprove that. In any case, the apparent compaction seems to be compatible with a large porosity, relatively low density.

What they do next is unknown. From what I understand, they do not have the option of lifting the mole out and trying a different location. Moreover, the images and data suggest it wouldn’t matter anyway. The mole is apparently not designed to drill a shaft in this kind of ground.

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The travels of China’s Yutu-2 rover on the Moon

9:34 am

Yutu-2 and Chang'e-4
Click for full image.

The Lunar Reconnaissance Orbiter (LRO) science team today released images that track the travels of China’s lunar rover Yutu-2 from its landing on January 30, 2019 through June 3, covering the rover’s first six lunar days on the Moon.

The image to the right, cropped, reduced, and annotated to post here, shows the relative positions of both spacecraft as of June 3, 2019. In the release they also included a gif movie showing the progression of Yutu-2’s movements since landing.

Once a month, LRO passes over the Chang’e 4 landing site, allowing LROC to capture a new image. LROC has now imaged the site five times (since the landing) and observed Yutu-2 to have traveled a total of 186 meters (distance measured using the rover tracks). If you squint, portions of the rover tracks are visible as a dark path in the images from April, May, and possibly June.

table of Yutu-2's movements through June 2019

The LRO release also included a table showing the distance Yutu-2 has traveled with each lunar day, shown on the right. The table does not include the 23 meters (75 feet) the rover traveled on its sixth lunar day. My estimate yesterday that Yutu-2 was traveling an average of about a 100 feet per day, with the distances per day shrinking with time, seems largely correct. During the rover’s fourth and fifth lunar days it moved very little, either because they had found something very interesting they wanted to inspect more closely, or they were moving more cautiously as the rover’s life extended past its planned lifespan of three lunar days.

On the sixth day however they increased their travels again, suggesting that either they had finished the observations at the previous location, or they had gained more confidence in the rover’s staying power.

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SpaceX seeking more investment capital

9:09 am

Capitalism in space: SpaceX has begun its third round of private fund-raising this year, this time seeking more than $300 million.

The latest round, filed on Monday, seeks to raise $314.2 million at a price of $214 a share, according to a document seen by CNBC. The new equity would bring SpaceX’s total 2019 fundraising to $1.33 billion once completed.

The block of this new round appears to already be funded from the Ontario Teachers’ Pension Plan.

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Chaos on Mars

9:01 am

Aurorae Chaos in Margaritifer Terra
Click for full image.

The Mars Express science team today released a digital perspective view of the chaos terrain located in the outlet region for the vast drainages, which include Marineris Valles, coming down from the Tharsis Bulge volcanic region that holds Mars’ largest volcanos.

The view, reduced to post here on the right, was created from a image taken by Mars Express on October 31, 2018. This chaos terrain is south of the various examples of chaos terrain previously highlighted here on Behind the Black (May 14, 2018, June 26, 2018, March 11, 2019, March 14, 2019). As they note,

The division between the chaotic terrain and plains can also be seen clearly in these images. The left (south) side of the image is notably smoother and more featureless than the jumbled right (north) side, and the two regions are split by a prominent line carving diagonally across the frame. The transition area around this scarp is especially broken and fractured; this is thought to be caused as the martian crust stretched and moved.

…
The ancient chaotic terrain we see on Mars holds information about how water once permeated and interacted with the planetary surface, including how it was transported, stored, and released.

Chaotic terrain is thought to have formed as chunks of the martian surface collapsed in dramatic events triggered by the heating of material containing ice or water-bearing minerals – possibly due to climatic or volcanic heat sources, or an impact from an asteroid or comet. This released large amounts of water, causing the terrain above to subside. The water then drained away quickly, leaving behind the messy, broken patterns seen in regions such as Aurorae Chaos, which is thought to have formed some 3.5 billion years ago.

Mars Express images don’t quite have the resolution of the high resolution images from Mars Reconnaissance Orbiter, but they cover a wider area, so that the spacecraft has now photographed almost the entire Martian surface since its arrival in Mars orbit in December 2003.

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