Tag: Portal

China’s Kuaizhou-1A rocket fails during launch

8:33 am

China’s Kuaizhou-1A rocket experienced its second launch failure on December 14th, though few details about what went wrong have been released.

The Kuaizhou-1A rocket is built by one of China’s pseudo-private companies, Expace.

Expace had been encouraged by three successful Kuaizhou-1A launches across September, October and November, which followed the Kuaizhou-1A being grounded for one year as a result of a failure in September 2020.

Since the rocket’s first three stages use solid rocket motors, it must have been derived from military missile technology. Thus, the company is not private, even if it has obtained Chinese private investment capital, but closely supervised by the Chinese government and its military.

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Visible clean water ice on Mars

11:57 am

Crater with ice scarp
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, is today’s picture of the day for the high resolution camera on Mars Reconnaissance Orbiter (MRO). Taken on September 13, 2021, it shows an exposed scarp on the southern inner wall of a small 800-foot-wide crater.

What makes that scarp intriguing is its blue color. As noted by Shane Byrne of the Lunar and Planetary Lab University of Arizona, who wrote the caption:

This north-facing cliff appears to expose icy material that’s similar to other pole-facing scarps showing buried ice elsewhere on the planet. These cliffs give us a cut-away view of the buried ice in that location and can help answer questions about what the Martian climate was like when this ice formed.

The crater itself sits inside a much larger crater, as shown in the wider picture below.
» Read more

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Scientists confirm Parker entered Sun’s corona in April 2021

9:40 am

Scientists yesterday announced that the Parker Solar Probe successfully entered the Sun’s corona for the first time during its April 2021 close fly-by.

More information here, including some excellent short movies made from images created by Parker’s instruments.

The top edge of the corona is dubbed the Alfvén surface, and Parker’s passage across that boundary three different times during the April ’21 fly-by revealed it to be a sharp boundary that also has a great deal of topography. From the second link:

The first time Parker passed the Alfvén surface was the longest; it flew through the atmosphere for about five hours. Even as it continued flying toward the Sun, though, it popped back out, only to submerge again more deeply when it was at its closest approach — but briefly, that time exiting after just half an hour. Then, on its way outward, the spacecraft once again skimmed beneath the surface for a few hours.

“[The Alfvén surface] has to be wrinkly,” Kasper says. “It’s not fuzzy — it’s well-defined while we’re under it — but the surface has some structure to it.” So while the probe sees a smooth change in conditions while crossing the boundary, where the boundary is can change. The reason for this wrinkly surface is still an open question, though the researchers suspect the crossing over a pseudostreamer lower in the corona pushed the boundary out to enable the first crossing.

What’s clear is that inside the Sun’s atmosphere, conditions are different than just outside. Parker saw plasma waves moving back and forth instead of flowing outward. That difference was visible not just to the SWEAP and FIELDS instruments, which measure particles and electric and magnetic fields, respectively, but also to the probe’s WISPR imager.

The Parker science team also indicated that the preliminary data from the probe’s next two fly-bys — the most recent in November that was the closest yet — suggest it passed through the corona then as well.

One of the biggest unsolved mysteries about the Sun’s corona is that it appears to have a temperature in the millions of degrees, far hotter than the Sun’s surface below, something that is counter-intuitive. The expectation was that the atmosphere would be cooler than the surface. Finding out why the corona is hotter is one of the main science goals of Parker. It appears the probe is finally gathering data that might help solve that mystery.

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Webb launch delayed two days because of ground equipment issue

9:42 pm

After engineers at Arianespace’s French Guiana launch facility found an intermittent issue with ground equipment related to the Ariane 5 rocket launching the James Webb Space Telescope, it was decided to delay the launch two days to make sure the problem was resolved.

n a brief statement, NASA wrote on its website late Tuesday that the Webb team is “working a communications issue between the observatory and the launch vehicle system.”

Thomas Zurbuchen, associate administrator for NASA’s science mission directorate, said Tuesday that engineers found an “interface problem” in a system that communicates with Webb while it’s on top of the Ariane 5 rocket. “The way to think about it is it’s a ground support equipment thing,” Zurbuchen said Tuesday night in an interview with Spaceflight Now. “Basically, the data cables are dropping some frames.”

Technicians inside the Ariane 5 rocket’s final assembly building in Kourou have tried to diagnose the problem, but so far, haven’t been able to resolve it.

The December 24th target day date remains tentative, and could slip to December 25th, or even later, depending on how successful engineers are at fixing the issue.

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99.9% of all mass at center of Milky Way is found in central black hole

10:46 am

New measurements of the orbits of several stars circling the Milky Way’s central supermassive black hole, Sagittarius A* (pronounced A-star), have confirmed that 99.9% of all mass at the galaxy’s center is concentrated in that black hole.

Astronomers have measured more precisely than ever before the position and velocity of four stars in the immediate vicinity of the supermassive black hole that lurks at the center of the Milky Way, known as Sagittarius A* (Sgr A*) [1]. These stars — called S2, S29, S38, and S55 — were found to be moving in a way that shows that the mass in the center of the Milky Way is almost entirely due to the Sgr A* black hole, leaving very little room for anything else.

The measurements, which further refine the mass of Sagittarius A* as 4.3 million times the mass of the Sun, show that very little of this mass is found in the surrounding space as gas or dark matter. It is all in the black hole, which might also help explain why the Milky Way’s central black hole is so quiescent. It has very little gas or other stars to feed it and thus produce emissions.

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Conflict in Hubble constant continues to confound astronomers

9:56 am

The uncertainty of science: In reviewing their measurements of the Hubble constant using a variety of proxy distance tools, such as distant supernovae, astronomers recently announced that their numbers must be right, even though those numbers do not match the Hubble constant measured using completely different tools.

Most measurements of the current acceleration of the universe (called the Hubble constant, or H0) based on stars and other objects relatively close to Earth give a rate of 73 km/s/Mpc. These are referred to as “late-time” measurements [the same as confirmed by the astronomers in the above report]. On the other hand, early-time measurements, which are based on the cosmic microwave background emitted just 380,000 years after the Big Bang, give a smaller rate of 68 km/s/Mpc.

They can’t both be right. Either something is wrong with the standard cosmological model for our universe’s evolution, upon which the early-time measurements rest, or something is wrong with the way scientists are working with late-time observations.

The astronomers are now claiming that their late-time observations must be right, which really means there is either something about the present theories about the Big Bang that are fundamentally wrong and that our understanding of early cosmology is very incomplete, or the measurements by everyone are faulty.

Based on the number of assumptions used with both measurements, it is not surprising the results don’t match. Some of those assumptions are certainly wrong, but to correct the error will require a lot more data that will only become available when astronomers have much bigger telescopes of all kinds, in space and above the atmosphere. Their present tools on Earth are insufficient for untangling this mystery.

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More delays for Blue Origin’s BE-4 rocket engine

9:35 am

Capitalism in space: According to a report yesterday at Ars Technica, more delays are expected in the delivery of Blue Origin’s BE-4 rocket engine to ULA, possibly preventing the first launch of Vulcan from occurring in ’22.

Testing suggests the engine itself is functioning well. However:

Blue Origin is unlikely to deliver two flight-ready versions of the BE-4 rocket engine to United Launch Alliance (ULA) before at least the second quarter of 2022, two sources say. This increases the possibility that the debut flight of ULA’s much-anticipated new rocket, Vulcan, could slip into 2023.

Vulcan’s first stage is powered by two BE-4 engines, which burn methane and are more powerful than the space shuttle’s main engines. The sources said there recently was a “relatively small” production issue with fabrication of the flight engines at Blue Origin’s factory in Kent, Washington. [emphasis mine]

Translation of the highlighted words: We have built the engine, it is working great, but we have suddenly discovered we haven’t figured out the mass production process for building it quickly and in large numbers so as to support numerous launches by both ULA’s Vulcan and Blue Origin’s New Glenn rockets.

ULA claims it can get Vulcan off the ground only a few months after getting those flightworthy BE-4 engines because it has done most of the design work using the dummy “pathfinder” BE-4 engines Blue Origin provided last year. Don’t believe it. The company is going to have to install working engines on Vulcan, and then do static fire tests to validate not only the rocket but its entire launch process. Such testing usually takes months, and is rarely completed in less than half a year, even by SpaceX.

These problems at Blue Origin means that both Vulcan and New Glenn will likely launch more three years behind schedule. Instead of 2020, both will fly no earlier than 2023, at best.

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NASA approves Axiom’s second commercial flight to ISS

9:19 am

In a strangely worded NASA press release, the agency announced that it has “selected” Axiom for the second private commercial manned mission to ISS.

NASA has selected Axiom Space for the second private astronaut mission to the International Space Station. NASA will negotiate with Axiom on a mission order agreement for the Axiom Mission 2 (Ax-2) targeted to launch between fall 2022 and late spring 2023.

As at present there appears to be no other American company planning commercial manned flights to ISS, NASA wasn’t “selecting” Axiom at all. All NASA was doing was approving Axiom’s proposal to fly the mission to NASA’s space station, while confirming that Axiom will pay NASA’s greatly increased charges, raised about 700% more than the older price list.

The language of this announcement, combined with the exorbitant NASA charges, is only going to accelerate the effort of private companies, including Axiom, to build their own independent space stations. It isn’t NASA’s place to “select” any privately funded commercial flight into space, ever. That this government agency is making believe it has that right is only going to alienate the new private space industry, giving them reason to get away from NASA as fast as possible.

Meanwhile, Axiom is already scheduled to fly its first tourist flight to ISS in February 2022. The second flight that NASA “selected” today is to be followed by two more, for a total of four tourist flights. At that point, around 2024, Axiom will then launch its first module to ISS, beginning the process of relying less on NASA and leading to the undocking of Axiom’s station from ISS.

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Superheavy prototype #4 installed on orbital launchpad

9:06 am

Capitalism in space: SpaceX has now installed its fourth Superheavy prototype on the orbital launchpad at Boca Chica, with the possibility of the first static fire test of Superheavy possibly occurring in the next week or so.

Around 10am CST (UTC-6), SpaceX began retracting more than a dozen clamps that hold the 69m (~225 ft) tall Super Heavy – the largest booster ever built – to its transport and work stand. By 11:30am, Booster 4 was safely extracted from the stand and hovering above it as the lift team crossed their Ts and dotted their Is before proceeding. SpaceX’s newest Starbase crane then spun around and crawled a short distance to the orbital launch mount, where it lifted Booster 4 above the mount.

In a process that this particular Super Heavy prototype is thoroughly familiar with, SpaceX then very carefully lowered B4 down into the center of the donut-shaped orbital launch mount, where 20 separate clamps – each capable of deploying and retracting – form a support ring and giant hold-down clamp.

The booster has 29 Raptor engines total, with 20 in the outer ring, 8 in the inner ring, and 1 in the center. It will be quite amazing to watch all these engines finally fire and lift the entire rocket, with Starshp, off the launchpad.

As for the upcoming static fire tests, road closures have been announced starting today through the end of this week.

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Boeing switches Starliner service modules for unmanned demo flight

8:57 am

According to a NASA press release today, Boeing has decided to swap Starliner service modules for the capsule’s first two missions, using the service module intended for the first manned flight on the unmanned demo flight, and assigning the service module for the unmanned demo flight — which had the valve issue — to the first manned flight.

The launch schedule for these two flights is now targeting May for the unmanned demo flight and August for the first manned Starliner demo mission.

Ongoing investigation efforts continue to validate the most probable cause to be related to oxidizer and moisture interactions. NASA and Boeing will continue the analysis and testing of the initial service module on which the issue was identified leading up to launch of the uncrewed OFT-2 mission in August 2021.

In other words, though they are claiming that they have figured out the sticky valve problem in that service module, it is also quite likely that it will not be used in August 2021. I suspect they will eventually put it aside and use another service module for the manned mission, and have only said now that they will use it on the manned mission for PR reasons. It appears they are confident the valve issue is solved for other service modules, but are not yet satisfied this troublesome service module is trustworthy.

The May-August schedule is tight, but doable, assuming the May unmanned flight goes well. If the August manned demo mission also goes well, Boeing will finally be able to begin selling seats on its Starliner capsule, though I would not be surprised if it makes no sales to anyone but NASA for the next few years. Considering its problem-filled development, private users are going to be reluctant to use this capsule until it establishes a successful track record.

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China launches second communications satellite for its manned space station missions

8:39 am

The new colonial movement: China today launched the second Tianlian communications satellite for its manned space station missions, using its Long March 3B rocket.

No word on whether the rocket’s first stage used parachutes or grid fins to control its crash landing in the interior of China.

The leaders in the 2021 launch race:

48 China
28 SpaceX
22 Russia
6 Europe (Arianespace)
5 ULA
5 Rocket Lab

China now leads the U.S. 48 to 45 in the national rankings. This launch was the 124th in 2021, making the sixth most active year in rocketry since Sputnik in 1957.

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Curiosity looks back at its entire journey

10:03 am

Curiosity looking back across Gale Crater
Click for high resolution mosaic. Original images here, here, here, and here.

Wide overview map
Click for interactive map.

Cool image time! The mosaic above was created from four photos taken by Curiosity’s left navigation camera on December 12, 2021, just after the rover had moved into Maria Gordon Notch. The view is to the north, looking back at the rover’s journey climbing up the floor of Gale Crater into the foothills of Mount Sharp. The rim of Gale Crater can be seen about 25 to 30 miles away.

The cliff in shadow on the left is about 40 feet high. The cliff in sunlight on the right is between 30 to 60 feet high, depending on where you measure.

The overview map to the right shows Curiosity’s entire journey, with the yellow lines indicating the approximate area covered by the mosaic above. All told the rover has climbed about 1,700 feet since it landed. While much of the rover’s route is blocked from our view by the cliffs on left, the nearest sand dune sea in the center of the mosaic is the one that the rover circled around from January 2021 to June 2021.
» Read more

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Russia’s Proton rocket launches two communications satellites

8:35 am

Russia early today successfully launched two Russian civilian communications satellites using its Proton rocket on its second launch in 2021.

This was Russia’s 22nd successful launch in 2021, matching its total from 2019 and the highest since 2015. In that year its launch totals dropped as its international commercial market share switched to SpaceX, partly because of the lower prices that American company offered and partly because of the many quality control problems in the Russian aerospace industry that were causing numerous launch failures.

With two more launches still on its manifest, ’21 looks like it will be a good year for Russia.

The leaders in the 2021 launch race:

47 China
28 SpaceX
22 Russia
6 Europe (Arianespace)
5 ULA
5 Rocket Lab

China still leads the U.S. 47 to 45 in the national rankings. With 123 launches this year, ’21 is now tied as the sixth most active year in the history of rocketry.

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Mexico signs Artemis Accords

12:33 pm

Mexico on December 9, 2021 became the fourteenth nation to sign the U.S.-led Artemis Accords, designed to bypass the Outer Space Treaty’s restrictions on private property in space.

[Marcelo Ebrard Casaubon, Mexico’s secretary of foreign relations,] announced Mexico’s accession to the accords at an event attended by several other Mexican government officials as well as U.S. Ambassador to Mexico Ken Salazar and José Hernández, a former NASA astronaut. Hernández said in the statement that Mexico’s decision to join the Artemis Accords was evidence that, for this return to the moon, “we are going to do it as a community.”

The full list of signatories at this moment: Australia, Brazil, Canada, Italy, Japan, Luxembourg, Mexico, New Zealand, Poland, South Korea, the United Kingdom, the United Arab Emirates, Ukraine, and the United States.

Russia and China have both said they oppose the accords. Both want control to be centralized to the government, and the accords act instead to strengthen the rights of the citizens and private companies in space.

France and Germany remain the two major Western space powers who have not signed the accords. Both undecided on what they will do. Both seem eager to partner with Russia and China, and to do so also seem willing to abandon in space concepts of private property and individual rights in order to make those partnerships happen. At the same time both — especially Germany — have been pushing private enterprise in space.

This policy conflict is making both countries appear very confused.

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FAA to discontinue program to issue wings to everyone who flies in space

10:20 am

The FAA has decided to end an on-again-off-again program, only started in 2005, that issue wings to everyone who makes their first flight into space on a private commercial spacecraft.

he Federal Aviation Administration will stop awarding commercial astronaut wings at the end of this year, five months after it revised the criteria for receiving the wings.

The FAA announced Dec. 10 that it will award wings to all non-government individuals that flew on FAA-licensed commercial vehicles to date in 2021, as well as those who fly on any remaining launches through the end of the year. However, it will not award wings to anyone, either crew members or spaceflight participants, that flies on FAA-licensed vehicles after this year.

The program was merely a public relations effort designed to give an honor to tourists and others who flew on non-governmental space missions. The FAA is now getting out of that business, leaving it to the commercial space companies themselves.

That part of the reasons is that the FAA was finding it difficult to come up with a good criteria for awarding the wings based on the increasing numbers of people now flying on private missions is actually wonderful. It means going into space is becoming more routine.

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New Shepard completes another suborbital passenger flight

9:21 am

Capitalism in space: Blue Origin’s New Shepard suborbital spacecraft today completed its third commercial suborbital passenger flight, this time carrying six people, including Laura Shepard Churchley, the daughter of Alan Shepard, the first American to fly in space.

Churchley, as well as former football player Michael Strahan, were not a paying passengers. What the other passengers paid for their flights has not been revealed. Nor has Blue Origin listed a ticket price anywhere.

It is good news that Blue Origin is now doing these suborbital commercial flights regularly. It would be much better news if the company started manufacturing its BE-4 engine as regularly so that its orbital New Glenn rocket could do the same.

Sorry for the lack of posting yesterday. I was starting the preparations for a caver’s party today at my home, and needed to do stuff related to that. While most of the organized caving community has blacklisted me and several others because we don’t cower in our basement doing zoom meetings but go caving instead, a good number agree with us and are coming today. Partying sometimes comes ahead of work!

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Russia selects first astronaut to fly on Dragon

8:19 am

Russia, as part of the continuing barter deal with NASA for seats on the capsules of both countries, has selected rookie astronaut Anna Kikina to be the first Russian to fly on a Dragon capsule.

Kikina is the only woman currently active in the Russian cosmonaut corps. She was selected in 2012 but has yet to fly in space, although Rogozin and other Russian officials had previously said she would fly in the fall of 2022. She would likely be on the Crew-5 Crew Dragon mission, to which NASA astronauts Nicole Mann and Josh Cassada and JAXA astronaut Koichi Wakata are currently assigned.

While according to the Russians the barter deal is finalized, according to NASA negotiations are still ongoing. This announcement by the Russians might actually be a negotiating tactic, since the tensions between the U.S. and Russia over Russian threats to the Ukraine could threaten the partnership at ISS. By making this announcement the Russians might be trying to make the barter deal an accomplished fact.

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China launches two satellites with Long March 4B

8:08 am

China today launched two satellites thought to be for military reconnaissance, using its Long March 4B rocket.

The leaders in the 2021 launch race:

47 China
27 SpaceX
21 Russia
6 Europe (Arianespace)
5 ULA
5 Rocket Lab

China now leads the U.S. 47 to 45 in the national rankings. There have now been 122 successful launches in 2021, making it the seventh most active year in the history of space exploratoin.

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Curiosity takes a close look at a Martian cliff

11:15 am

A cliff of Mars
Click for full resolution. Original images here and here.

Curiosity has now moved up and into Maria Gordon Notch, a gap in the mountains of Gale Crater that is about forty feet wide, with a 40-foot-high cliff on its western side and a 30 to 60 foot cliff on its eastern side.

The mosaic above, created from two navigation camera images, looks up at the top half of that western cliff. Note the many many layers, each one of which records some climate or volcanic event in Mars’ geological history. The Mars we see today took a long time and many events to become what it is. Such layers however have not been seen everywhere by Curiosity. Compare for example this layered cliff with the massive outcrop dubbed Siccar Point and looked at closely by the rover in October. In that outcrop the layers were either non-existent, or merged together during some subsequent geological process.

Note also the pond of sand/dust at the center-bottom, nestled in a hollow but sitting almost vertical. That the dust can maintain itself at such an angle illustrates Mars’ lighter gravity, about 39% of Earth’s, which in turn allows for a much steeper angle of repose. That lighter gravity also allows for some sections of rock to stick out more precariously than possible on Earth.

As Curiosity moves through the notch in the next few days, more such cool pictures will become available, and I shall post them.

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India outlines new schedule for lunar and manned missions

10:07 am

According to press statements by India’s Minister for Science & Technology, Jitendra Singh, the schedule for that country’s next unmanned lunar lander/rover and its first manned missions have now been firmed up.

First, Singh announced that the lunar lander/rover, Chandrayaan-3, is now aiming for a launch to the Moon in the second quarter of ’22. The mission is essentially a rebuild of Chandrayaan-2, which got within a few hundred feet of the lunar surface before losing control and crashing in 2019. Chandrayaan-3 had initially been scheduled for launch in late 2020, but the COVID panic essentially shut down India’s entire space industry in both ’20 and ’21.

Second, Singh announced that India’s manned orbital Gaganyaan mission is now scheduled for launch in ’23.

Jitendra Singh said that the major missions like Test vehicle flight for the validation of Crew Escape System performance and the 1st uncrewed mission of Gaganyaan (G1) are scheduled during the beginning of the second half of 2022. This will be followed by a second uncrewed mission at the end of 2022 carrying “Vyommitra” a spacefaring human robot developed by ISRO and finally the first crewed Gaganyaan mission in 2023.

Like Chandrayaan-3, Gaganyaan was delayed significantly by the panic in India over COVID. It was originally scheduled for launch in December ’21, but the panic caused all work to stop for most of ’20 and ’21. During that time period India’s planned annual launch pace of 6 or more launches per year shrank to a mere three launches over two years, with little sign yet that ISRO is ready to resume launches.

Hopefully, these announcements are a signal that India will fully return to flight in ’22. Stay tuned.

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Stratolaunch wins military research contract

9:39 am

Capitalism in space: Stratolaunch announced today [pdf] that it has won research contract with the Missile Defense Agency to provide a testing capability to that agency’s program to develop hypersonic flight technology.

The Stratolaunch team is eagerly preparing to complete its next set of Roc carrier aircraft test flights. The team also continues to make tremendous strides in building its first two Talon-A test vehicles: TA-0 and TA-1. TA-1 will start its power-on testing by the end of year, keeping the company on track to begin hypersonic flight testing in 2022 and to deliver services to government and commercial customers in 2023. Launched from Stratolaunch’s Roc carrier aircraft, the Talon-A vehicles are rocket-powered, autonomous, reusable testbeds carrying customized payloads at speeds above Mach 5.

From this release it appears that the company is planning more flight tests of its giant Roc airplane while it begins the first ground tests of the test vehicles that Roc will take into the air, followed in ’22 with flight tests, followed next with operational test flights in ’23.

The company’s shift from using Roc as a first stage for orbital satellites to using it instead as a hypersonic test bed seems to be paying off. For years the company was unable to find any design for second stage rocket that made both technical or economic sense. Using Roc instead as a vehicle for launching a hypersonic test bed — the Talon — seems more practical, while also providing the military a relatively cheap capability for hypersonic testing that it had previously lacked.

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NASA issues vague update on Lucy’s solar panel deployment issue.

9:29 am

Lucy solar panel graphic

NASA today released a very vague update describing the work of the Lucy engineering team in trying to work out a fix to the incomplete deployment of one of Lucy’s solar panels.

A project team completed an assessment Dec. 1 of the ongoing solar array issue, which did not appear to fully deploy as planned after launch in late October. Initial ground tests determined additional motor operations are required to increase the probability of the latching Lucy’s array in place as intended, and the team has recommended additional testing.

Spacecraft operations included discharging and charging the battery while pointed at Earth, moving the spacecraft to point to the Sun, operating the solar array motor with the launch day parameters, moving back to pointing at Earth, and then another battery discharge and recharge. The solar arrays charge the batteries, then the batteries are deliberately discharged, and the solar array circuits are used to recharge the batteries; performing these charging and discharging processes gives the team more information about the solar array circuits.

The team gathered information on two of the 10 gores – the individual solar array panel segments that make up the full array — that previously had no data. NASA now has data on all 10 gores confirming they are open, producing power as expected, and not stuck together. [emphasis mine]

Apparently they have been doing a variety of testing of the array to assess its precise condition. The highlighted words are the most important, as this data suggests that all ten fan sections, as shown in the graphic above, are partly open, and that an attempt to fully deploy the solar panel should work.

The Lucy team has apparently decided to approach this work very slowly and cautiously, that they have time to do so as Lucy continues its slow journey to Jupiter’s Trojan asteroids.

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SpaceX launches NASA X-ray telescope

9:17 am

Capitalism in space: SpaceX early this morning successfully launched NASA’s Imaging X-ray Polarimetry Explorer (IXPE), a small X-ray telescope designed to black holes and neutron stars.

The first stage, making its fifth flight, successfully landed on a drone ship in the Atlantic.

This launch, SpaceX’s 28th for 2021, extends once again the company’s all time record for the most launches in a year by a private company.

The leaders in the 2021 launch race:

46 China
28 SpaceX
21 Russia
6 Europe (Arianespace)
5 ULA
5 Rocket Lab

China’s lead over the U.S, in the national rankings has now shrunk to 46 to 45. The launch was the 121st in 2021, making this year tied as the seventh most active year in the history of space, a ranking that is sure to go up before the end of the year.

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Rocket Lab successfully launches two more BlackSky Earth observation satellites

5:15 pm

Capitalism in space: Rocket Lab today successfully launched from its launchpad in New Zealand two more satellite for the Earth observation company BlackSky, completing the launch only 21 days after their previous launch, tying the company’s fastest turnaround.

This was Rocket Lab’s fifth launch in 2021, which the company states will be its last this year. At the start of the year it had predicted it would complete this number, so the company has at least matched its expectations for 2021, despite governmental hold-ups in both New Zealand and Wallops Island that slowed the launch pace.

The leaders in the 2021 launch:

46 China
27 SpaceX
21 Russia
6 Europe (Arianespace)
5 ULA
5 Rocket Lab

China’s lead over the U.S. in the national rankings is now 46 to 44. SpaceX has a scheduled launch later tonight, so the race between the two countries should continue to tighten.

This was also the 120th successful launch in 2021, the most in a single year since 1984, and making it the ninth most active year in the history of space exploration.

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Strange eroded glacial flows in unnamed crater on Mars

12:20 pm

Eroded glacial flows in unnamed crater on Mars
Click for full resolution image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on November 1, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a series of strange glacial-like flows coming off the western slopes of the central peak of a 40-mile-wide unnamed crater, located smack dab in what I call Mars’ glacier country, that 2,000 long mid-latitude strip where almost every image shows evidence of glaciers.

The cropped section to the right doesn’t really do these strange flows justice. Make sure you click on the image to see the full resolution version. There are numerous separate flows coming off that central peak. Each appears to show that as time passed, each flow traveled a shorter distance down the mountain, leaving a moraine behind at higher and higher points.

The overview map below provides the context.
» Read more

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NASA upgrades software for monitoring potentially dangerous asteroids

9:59 am

NASA has installed a major upgrade to the software it uses for monitoring, tracking, and predicting the future orbits of potentially dangerous asteroids.

Sentry [the original software used for the past 20 years] was very effective at calculating orbital paths based on how an asteroid is affected by the gravitational pull of the Sun and planets, but there were a few factors that it couldn’t account for. In the long run, these uncertainties can snowball into many possible orbits that may or may not impact Earth.

The Yarkovsky effect, for instance, is where the Sun unevenly heats the surface of an asteroid as it spins, creating thermal forces between the “day” and “night” sides of the rock that can produce thrust. Other times, asteroids that swing past Earth very closely could be nudged into different orbits by the planet’s gravity, changing the paths of their eventual return.

The first Sentry system couldn’t incorporate either of these two factors, meaning that for special case asteroids like Bennu or Apophis, astronomers would have to manually analyze their orbits, which is a complex and time-consuming process.

But Sentry-II is designed to account for things like these. This latest version uses a different algorithm that models thousands of random points within the uncertainty space of an asteroid’s orbit, then figures out which ones have a chance of striking Earth in future. This, the team says, could help find scenarios that have very low probability of impact.

What this upgrade means is that as new asteroids are discovered the software will be able to very quickly calculate with better accuracy any potential impacts in the coming centuries. The results won’t be perfect, but less manual work will be necessary, meaning fewer dangerous asteroids will fall through the cracks.

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Where Ingenuity and Perseverance presently sit in Jezero Crater

9:15 am

Perseverance and Ingenuity, December 8, 2021
Click for interactive map.

The map to the right, annotated to post here, shows the present location of the rover Perseverance (the red dot) in relation to the 17th flight of the helicopter Ingenuity (indicated by the green line and dot) that successfully occurred on December 5, 2021.

Perseverance has been very very very very slowly retreating south, following the same route it took to move into the rough sand dune region the scientists have dubbed Seitah. Based on their long term plans, the rover will retrace its path (the white dotted line) to its landing site, and then continue along the yellow dashed line to eventually reach the base of the delta, dubbed Three Forks, that in the distant past poured through a gap in the rim of Jezero Crater.

The helicopter meanwhile is also retracing its flights, heading north to the spot where Perseverance first placed it on the ground. Because of the seasonally thinner atmosphere, the helicopter’s flights during that return journey must be shorter, which is why the 17th flight only traveled halfway across Seitah. In crossing it the first time it had done so in one flight. Now it will take two.

During that 17th flight it appears that the topography between the rover and the helicopter’s landing site caused a loss of communications as the helicopter was landing.

The Ingenuity team believes the 13-foot (4-meter) height difference between the Perseverance rover and the top of Bras [an outcrop] contributed to the loss of communications when the helicopter descended toward the surface at the end of its flight.

That loss of communications apparently caused no problems, but it will likely mean that Ingenuity will do no more flights until Perseverance can get closer and better positioned.

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