Tag: spaceflight

SpaceX successfully launches GPS satellite for Space Force

9:40 am

Capitalism in space: SpaceX today successfully launched a new GPS satellite for the Space Force.

As I post this the second stage has not yet deployed the satellite, though it is in orbit. UPDATE: As expected the satellite has been successfully deployed into its proper orbit.

This was the first Space Force launch using a reused Falcon 9 first stage. The stage, making its second flight, successfully landed on the drone ship, broadcasting the absolutely best video ever of such a landing, with the cameras on both the stage and the drone ship working without distortion throughout the landing to touchdown. The live stream is embedded below the fold, with that landing at 8:34 minutes after launch.

The two fairing halves are new but their pick up method for reuse has been streamlined:

For this mission, a new vessel has joined SpaceX’s oceangoing recovery fleet. HOS Briarwood will attempt to recover Falcon 9’s payload fairing halves after they splash down in the Atlantic Ocean. Similar in size to Shelia Bordelon, the previous temporary fairing recovery vessel, HOS Briarwood can be booked as a “flotel” and features an enormous crane, along with seemingly just enough deck space to support two recovered fairing halves.

Apparently, allowing the halves to land directly on the ocean surface and act as floating boat hulls until the ship can pick them up on a single ship, using a crane, is now the recovery method. There is also the hint that SpaceX might also be planning to sell tickets on this ship for people who wish a vacation watching that fairing recovery operation.

The leaders in the 2021 launch race:

19 SpaceX
17 China
8 Russia
3 Northrop Grumman

The U.S. now leads China 27 to 17 in the national rankings. Note: The average number of American launches per year during the 21st century (from 2000 to 2020) was 22. The U.S. has now topped that average by five launches, and the year is not even half over.
» Read more

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Chinese astronauts successfully launched into space

6:55 pm

The new colonial movement: Using its Long March 2F rocket China tonight (June 17th in China) successfully launched three astronauts into orbit on their Shenzhou manned capsule for a planned three month mission to the first module of their new space station.

The most recent update as I post this:

Chinese mission control has confirmed today’s launch was a success, placing the Shenzhou 12 capsule into an orbit ranging in altitude between 120 miles (220 kilometers) and 208 miles (335 kilometers). Docking with the Tianhe core module is expected in approximately six hours. The rendezvous will be fully automated.

No word on where the four strap-on boosters and core stage landed within interior China.

The leaders in the 2021 launch race:

18 SpaceX
17 China
8 Russia
3 Northrop Grumman

The U.S. still leads China 26 to 17 in the national rankings, and will add to that lead if a planned SpaceX launch tomorrow goes as planned.

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Hubble in safe mode due to computer problem

1:47 pm

A computer failure on June 13th put the Hubble Space Telescope in safe mode, with engineers hoping to have the problem resolved and the telescope back in operation by tomorrow.

NASA is working to resolve an issue with the payload computer on the Hubble Space Telescope. The computer halted on Sunday, June 13, shortly after 4 p.m. EDT. After analyzing the data, the Hubble operations team is investigating whether a degrading memory module led to the computer halt. The team is preparing to switch to one of several backup modules on Wednesday, June 16. The computer will then be allowed to run for approximately one day to verify that the problem has been solved. The team would then restart all science instruments and return the telescope to normal science operations.

The unit itself, while built in the 1980s, was only launched to Hubble in 2009 as part of the last shuttle repair mission.

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The Mountains of Mars

12:05 pm

The mountains of Mars
Click for full resolution. The highest mountain on the right is about 450 feet high.

Even as the rover Perseverance is beginning its first science campaign on the floor of Jezero Crater, the rover Curiosity about 3,000 miles to the east has begun its climb into the mountains of Mars that surround the central peak of Gale Crater, Mount Sharp.

The mosaic above, made from two images taken by the rover’s right navigation camera (here and here), shows what Curiosity sees ahead. Since my last update on June 4th describing Curiosity’s future travels, the rover’s science team has pushed forward directly uphill towards the entrance to the canyon Gediz Vallis, visible as the gap between the mountains to the right and left in the above mosaic.

The overview map below shows the rover’s approximate present position, with the yellow lines indicating what the above photo is looking at.
» Read more

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FAA, local Texas DA, and environmental group out to get SpaceX and Starship

10:16 am

Two news articles today suggest that a number of government officials, environmental groups, and some news media are beginning to team up to damage SpaceX and hinder its ability to succeed.

First we have this Verge article, aimed at suggesting that SpaceX violated its launch license and ignored FAA warnings not to launch during a December 9th test flight of the eighth Starship prototype.

Minutes before liftoff, Elon Musk’s SpaceX ignored at least two warnings from the Federal Aviation Administration that launching its first high-altitude Starship prototype last December would violate the company’s launch license, confidential documents and letters obtained by The Verge show. And while SpaceX was under investigation, it told the FAA that the agency’s software was a “source of frustration” that has been “shown to be inaccurate at times or overly conservative,” according to the documents.

The article generally takes the side of the FAA, suggesting that SpaceX was lax and nonchalant about the risks relating to weather and launch conditions, and proceeded with its launch even though FAA officials thought it unsafe. It also quotes Wayne Monteith, the head of the FAA’s space division, blasting SpaceX for showing “a concerning lack of operational control and process discipline that is inconsistent with a strong safety culture,” claiming that FAA software showed a risk to nearby buildings and homes should the rocket explode in the air.

However, buried far down in the article it also notes,
» Read more

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Another smallsat startup announces plans to build its own orbital space tug

9:34 am

Capitalism in space: The smallsat launch startup Launcher announced yesterday that it in addition to developing its own rocket, it plans to build an orbital space tug that can be used both by it and on other smallsat satellites.

Launcher, which announced a $11.7 million funding round June 2, said its Orbiter tug will be able to carry up to 150 kilograms of payload, either in the form of 90 units worth of cubesat deployers or larger satellites using standard smallsat separation systems. Orbiter can also accommodate hosted payloads with power, communications, and other capabilities. Orbiter is equipped with a chemical propulsion system using ethylene and nitrous oxide propellants. The vehicle will initially provide 500 meters per second of delta-v, or change in velocity, but that can be increased by adding more propellant tanks.

Orbiter is intended for use on Launcher Light, the small launch vehicle the company is developing, with a first launch projected in 2024. However, Orbiter is also capable of flying on other launch vehicles using an ESPA Grande adapter ring. Orbiter’s first mission is scheduled for October 2022, when it will fly on a SpaceX Falcon 9 rideshare mission.

That makes about four companies, Launcher, Momentus, Spaceflight, and D-Orbit, building space tugs for use on smallsats. Some will be on board a Falcon 9 launch set for later this month.

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Some Starlink units shut down if weather gets too hot

9:27 am

Capitalism in space: Some users of SpaceX’s Starlink internet dishes have found that the units shut down if the local weather gets too hot.

The units presently being distributed to customers are beta units, designed to test the system before SpaceX rolls out full commercial availability, so finding such issues is not unexpected. According to one engineer quoted at the link,

Engineers could change Dishy’s mechanical design to achieve better heat rejection, change the dish’s electrical components to expand its thermal operating window, or develop a feature that allows Dishy’s components to operate at reduced power to create less heat. He noted the latter two options would likely be taller orders. “If changes to Dishy’s mechanical design are insufficient to reject heat at a rate exceeding its ability to produce it, software changes will be required to make the system more thermally efficient,” Keiter said. “But if speed limiting and system optimization can’t fix the issue, it will require a significant hardware revision for the commercial launch.”

“Since they’ve got a lot of custom silicon in there—likely the limiting factor—the turnaround time on this would be very slow,” he added. “They could resort to some form of active heat removal like fans or thermoelectric cooling, but then they burn a ton of power which would make Dishy even more power hungry than it already is.”

“This is a really tricky engineering problem with some insanely tight constraints,” Keiter said. “The good news is that the team is pretty sharp.”

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First manned mission to new Chinese space station to launch June 17th

9:19 am

The new colonial movement: China yesterday announced that the first manned mission to its new Chinese space station will launch tomorrow, June 17th, carrying three astronauts to the station’s Tianhe core module launched earlier this year.

One day before launch, China finally confirmed unofficial reports that it will launch the first crew to its new space station module, Tianhe, on June 17 Beijing Time (June 16 Eastern Daylight Time). It is China’s first human spaceflight launch in 5 years. The three men will stay aboard Tianhe for three months, the longest time in orbit for any Chinese crew.

During the three month mission the astronauts will do at least one spacewalk to likely deploy solar panels and other equipment preparing Tianhe for later modules.

The announcement also included statements by Russia that it has agreed to send Russian astronauts to the station at some point in the future.

No word on whether China will broadcast the launch live.

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Rocket Lab wins contract to build two Mars smallsat planetary probes

9:13 am

Capitalism in space: Rocket Lab has won a contract to build two Mars smallsat planetary probe as part of a NASA project.

The project, led by the University of California, will have two probes dubbed Blue and Gold that will launch in 2024 on a Falcon Heavy rocket. The science goal is to place two spacecraft in Mars orbit to provide a more global look at is atmosphere. The financial goal is to show that smallsats built for less can do the same job as larger probes costing millions more.

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Brazil signs Artemis Accords

9:04 am

Brazil on June 15th became the first South American country to sign the Artemis Accords, designed to bypass the limitations placed on property rights created by the Outer Space Treaty.

U.S. policy requires any nation that wishes to participate in its Artemis program to go back to the Moon to agree to the accords. Brazil is now the eleventh country to sign, joining Australia, Canada, Italy, Japan, Luxembourg, New Zealand, South Korea, the United Kingdom, the United Arab Emirates, Ukraine, and the United States.

Russia and China oppose the accords, which causes a problem for Russia as it desperately needs to partner with someone because it can’t on its own afford to build much. It is negotiating possible partnerships with China at its new space station as well as building a base on the Moon, but those agreements are not firm. And continues to send out feelers, including statements by Putin, calling for continuing cooperation with the U.S. in space.

Whether the Biden administration will make an exception for Russia in regards to the Artemis Accords remains unclear. That twelve countries have agreed to the accords however gives the U.S. greater leverage with those countries that have not yet signed.

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Northrop Grumman launches three military satellites using Minotaur rocket

8:56 am

Early this morning Northrop Grumman successfully used a former Minuteman rocket repurposed as a commercial rocket dubbed Minotaur to launch three military reconnaissance satellites for the National Reconnaissance Office.

The rocket’s solid-fueled stages were in themselves amazingly old.

The 69-foot-tall (21-meter) rocket is based on leftover solid-fueled motors from the U.S. Air Force’s Minuteman missile program. Designers added two Orion solid rocket motors on top of the lower two stages of a Minuteman missile to turn the bomb carriers into satellite launchers.

The Minotaur 1 rocket’s M55A1 first stage motor was cast with solid propellant in 1966 by Thiokol, now part of Northrop Grumman. The SR19 second stage motor, produced by Aerojet, was filled with its solid propellant in 1983, according to a Northrop Grumman spokesperson.

The age of the first stage means it is likely the oldest rocket motor ever used on a space launch.

The leaders in the 2021 launch race:

18 SpaceX
16 China
8 Russia
3 Northrop Grumman

The U.S. now leads China 26 to 16 in the national rankings.

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Boxwork in the basement of Mars

12:34 pm

Polygon ridges in Hellas Basin
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, shows what resembles closely what in Earth caves are called boxwork, polygonal ridges sticking out from the bedrock and usually indicating cracks filled with harder material that resist erosion.

Taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) on March 23, 2021, what makes this boxwork especially interesting is its size and location. On Earth cave boxwork generally ranges from a few inches to a few feet across. Not only do these Martian ridges range from 100 feet to a half mile in length, they are located at the lowest point in Hellas Basin, the basement of Mars. In fact, this spot is as close as you can get to Mars’ Death Valley, as shown by the overview map below.
» Read more

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Russian astronaut fired for opposing filming of movie on ISS

9:22 am

Krikalev on the shuttle to ISS flight in 1998
Sergei Krikalev on the first ISS assembly flight
by the space shuttle Endeavour in 1998.

According to one new story today, Russian astronaut, Sergei Krikalev, 62, was fired from his position in senior management within Roscosmos for opposing its decision to film for profit the first feature film on ISS.

Krikalev did not say why he was against the film but his stance was backed by former colleagues who said that taking a passenger would delay a flight for a cosmonaut. Roscosmos denied that Krikalev had been fired.

Krikalev is one of Russia’s most celebrated astronauts. He was the first person to fly in space who was born after Sputnik, was the first Russian to fly on the space shuttle, and was the first Russian (along with an American) to enter ISS’s first module soon after launch. Overall he has spent more than 800 days in space.

He also became the last Soviet citizen, stranded on Mir when the Soviet Union fell in 1991. When he launched, he was a citizen of the U.S.S.R. When he finally returned, that country didn’t exist, and he was now a citizen of Russia.

I interviewed him extensively for my book, Leaving Earth, because he was fluent in English due to his flights on the shuttle. What I learned was that Krikalev was then and probably still is an ardent communist. On that Mir flight he refused to be filmed in a commercial for Coca-Cola, arranged by Roscosmos to make some money. There was no way he would allow himself to be recorded in such a crass for-profit manner. Thus, I am not surprised he now opposes using Russian space facilities for a commercial movie, for profit.

I also found him to be a very thoughtful and analytical man, which also probably explains his opposition to this quickly arranged commercial flight. The film company is partly owned by Dmitry Rogozin, head of Roscosmos, so there probably is some payoffs and corruption involved. It is also probably interfering with the Russian side of operations, as the story says Krikalev claims. These factors would cause Krikalev to speak his mind and argue against the flight, which likely angered Rogozin, who is apparently pocketing some cash from the film.

I suspect Krikalev is not fired, but has merely been sent to the doghouse for a short while. Roscosmos (and Rogozin) can’t afford the bad publicity of letting him go. It also needs his expertise in their operations.

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Northrop Grumman’s Pegasus rocket launches military satellite

9:08 am

Early this morning Northrop Grumman’s Pegasus rocket successfully launched a military satellite under a program aimed at demonstrating a quick launch capability.

This was the first Pegasus launch since 2019, and only the fifth in the past twelve years. According to the article, Northrop Grumman significantly lowered its price for this launch, charging the Space Force $28.1 million, about half of what it charged NASA for that 2019 flight. Whether this is an effort to make the rocket more competitive, or is simply Northrop Grumman selling off its inventory, will remain to be seen.

The leaders in the 2021 launch race:

18 SpaceX
16 China
8 Russia
2 Rocket Lab
2 ULA
2 Northrop Grumman

The U.S. now leads China 25 to 16 in the national rankings.

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China releases more images from Zhurong

12:34 pm

Zhurong looking north past its lander
Click for full image.

The new colonial movement: Three weeks after its Mars rover Zhurong rolled off its lander to begin its 90 day mission, China yesterday finally released the first high resolution images taken by the rover.

The images included a 360 degree panorama, taken while the rover was still sitting on the lander, an image of both the rover and lander taken by a mini-camera that was dropped from the bottom of the rover, a picture of some interesting nearby boulders to the east, and a picture looking past the lander looking north.

This last picture is above, reduced and annotated by me. The small flat but distinct hill to the north I think is the nearest pitted cone that could be either a mud or lava volcano. That cone is about 3.75 miles away, and though a very enticing target is probably too far away for Zhurong to reach, unless it survives for years past its planned three-month mission, as did the American rovers Spirit and Opportunity.

The closer small ridges and hills just to its right could be the east and west rims of the nearest large crater, about 650 feet wide with a distorted shape, that is visible in the high resolution orbital images taken by both Tianwen-1 and Mars Reconnaissance Orbiter (MRO). This crater is about 1,600 feet away.

Based on these images it appears that once Zhurong rolled off the lander to the east, it immediately turned to the right to move several feet south, where it turned right again to move several feet to the west until it was just to the west of the lander, where it took the picture above. During that last move it dropped the small camera behind it so that it could take the picture showing both the rover and the lander.

These maneuvers and the rover’s position south of the lander and facing west suggest they are going to head to the west, where there are some nearby smaller craters and other interesting features. Whether they eventually go north, with that pitted cone a long term goal should the rover last longer than its planned mission through the end of August, remains entirely unknown.

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Blue Origin sells first tourist seat on New Shepard for $28 million

11:30 am

Capitalism in space: In a live auction today, Blue Origin successfully sold the first tourist seat on the first manned commercial suborbital flight of its New Shepard spacecraft for $28 million. With the additional fee of 6%, the total price was about $29.6 million.

I have embedded the replay of the auction below the fold, cued up to the auction start.

The bidding was amazingly fierce and aggressive, starting at $4.8 million. The final price is quite spectacular, actually $9+ million higher than what Dennis Tito paid to fly to ISS for several days back in the 1990s.

One wonders what SpaceX and Axiom have been charging for their orbital flights. I doubt it is this much. As I watched I wondered if the bidders were considering the time they would spend with Jeff Bezos as part of the value. These are wealthy people, and getting a chance to spend a lot of time with one of the richest men in the world might be far more valuable to them than the flight itself.

Regardless, we will know soon who won the auction, and will fly into space for a few minues or so on July 20th.

» Read more

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Zhurong finally located on Mars

11:58 am

Zhurong as seen by MRO
Click for full image.

Though the Chinese had earlier this week released one image taken by their Mars orbiter, Tianwen-1, showing their rover Zhurong on the surface of Mars, they did not provide any specific location information.

This lack has now been filled by a new high resolution image of Zhurong taken by Mars Reconnaissance Orbiter (MRO) on June 6, 2021. This image, cropped to match the Tianwen-1 image and annotated by me to post here, shows the parachute, entry capsule, heat shield, lander, and rover. I have added white dots to distinguish the rover from the lander, which indicate that since the Tianwen-1 orbital image the rover had moved south about 70 feet, suggesting it has been able to travel on the surface.

What this MRO image provides that the Chinese refused to reveal is the latitude and longitude of that landing site, which in turn tells us that the lander put down about 14 miles to the northwest of its targeted landing spot. The mosaic of MRO context camera images below show this landing spot in context with the surrounding terrain.
» Read more

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Update on Perseverance’s future travel plans

10:47 am

Perseverance's future travels
Click for full image.

The science team for the rover Perseverance yesterday released a revised map of where they intend over the next few months to send the rover on the floor of Jezero Crater.

The map to the right, cropped and reduced to post here, shows that route.

The first science campaign (depicted with yellow hash marks) begins with the rover performing an arching drive southward from its landing site to Séítah-North (Séítah-N). At that point the rover will travel west a short distance to an overlook where it can view much of the Séítah unit. The “Séítah-N Overlook” could also become an area of scientific interest – with Perseverance performing a “toe dip” into the unit to collect remote-sensing measurements of geologic targets.

Once its time at the Séítah-N Overlook is complete, Perseverance will head east, then south toward a spot where the science team can study the Crater Floor Fractured Rough in greater detail. The first core sample collected by the mission will also take place at this location. After Cratered Floor Fractured Rough, the Perseverance rover team will evaluate whether additional exploration (depicted with light-yellow hash marks) farther south – and then west – is warranted.

Whether Perseverance travels beyond the Cratered Floor Fractured Rough during this first science campaign, the rover will eventually retrace its steps. As Perseverance passes the Octavia B. Butler landing site, the first science campaign will conclude. At that point, several months of travel lay ahead as Perseverance makes its way to “Three Forks,” where the second science campaign will begin.

At that point the rover will begin studying the base of the delta of material that in the far past poured through a gap in the western rim of Jezero Crater.

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“The Endless SLS Test Firings Act”

9:46 am

The Senate passes a law! In the NASA authorization that was just approved by the Senate and awaits House action was an amendment — inserted by Senator Roger Wicker (R-Mississippi) — that will essentially require NASA to build an SLS core stage designed for only one purpose, endless testing at the Stennis Space Center in Mississippi.

The Stennis-specific provision says NASA should “initiate development of a main propulsion test article for the integrated core stage propulsion elements of the Space Launch System, consistent with cost and schedule constraints, particularly for long-lead propulsion hardware needed for flight.”

So what exactly is a “main propulsion test article,” and why does NASA need one? According to a Senate staffer, who spoke to Ars on background, this would essentially be an SLS core stage built not to fly but to undergo numerous tests at Stennis.

My headline above is essentially stolen from the Eric Berger article at the link. Because this ground test core is not funded, at best it would likely not be ready for testing prior to ’27 or ’28, at the earliest. By then who knows if SLS will even exist any longer, replaced by low-cost and far more useful commercial rockets. Thus, if this Wicker amendment survives, Stennis might be testing a core stage endlessly for a rocket that no longer exists.

And even if SLS is flying, what point is there to test a core stage that never flies? None, except if you wish to create fake jobs in Mississippi for your constituents, as Wicker obviously is trying to do.

Fortunately the bill is merely an authorization, and has not yet passed the House. Much could change before passage, and even after passage money will need to be appropriated to create this fake testing project.

Unfortunately, we are discussing our modern Congress, which has no brains, can’t count, and thinks money grows on trees. I would not bet against this fake testing program becoming law.

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Europe to fly mission to Venus to study its volcanoes

9:32 am

The European Space Agency yesterday announced that it will fly an orbiter to Venus in 2031, dubbed EnVision, to study the estimated million volcanoes on the surface of that hellish planet.

EnVision will use an infrared spectrometer to seek out hot spots on the surface that could indicate active volcanoes. It will use radar to map the surface, looking for signs of lava flows. Ultraviolet and high-resolution infrared spectrometers will then look for water vapor and sulfur dioxide emissions, to see whether smoldering volcanoes are driving cloud chemistry today.

This data will help determine exactly geologically active Venus’s volcanoes are. Several studies in the past decade using archival data (see here, here, and here) have suggested as many as 37 of those volcanoes are active, but this data remains uncertain.

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Evidence of past underground water in the Martian equatorial regions?

2:30 pm

Mosaic of strange feature
Click here, here, here, and here for full images.

Today’s cool image, to the right, takes us to the equatorial regions of Mars, a region that today appears quite arid and dry based on all the orbital and rover/lander data so far gathered. The photo and its complex geology however provides us a hint that once liquid water did exist here. At least, that is the hypothesis that scientists presently favor, though making it fit this complex geology is not simple or straightforward.

The mosaic to the right is made from four context camera images taken by Mars Reconnaissance Orbiter (MRO). It shows a very complicated series of depressions — one of which vaguely resembles a crater — that appear to have been washed out by some past erosion process, though that process could not have been that simple because of the fissures and cracks that dominate the floor of the circular feature.

I contacted Chris Okubo of the U.S. Geological Survey, who had requested a high resolution image from MRO of a small part of this mosaic, as indicated by the white box, to ask him what we are looking at. His answer was appropriately noncommittal:
» Read more

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Sierra Space makes deal with UK spaceport for Dream Chaser landings

9:05 am

Capitalism in space: Sierra Space has signed an agreement with a spaceport in Cornwall, England, allowing it to land its Dream Chaser mini-shuttles there.

Sierra Space signed a memorandum of understanding (MOU) with Spaceport Cornwall expressing support for future landings of Dream Chaser at the spaceport, also known as Cornwall Newquay Airport in southwestern England.

The MOU came after Sierra Space performed a study, supported by the U.K. Space Agency, evaluating the feasibility of using the spaceport for Dream Chaser landings. The lifting body vehicle is designed to glide to a landing on runways, and the initial study concluded the spaceport is “a suitable and viable return location for the orbital return” for Dream Chaser, Sierra Space said in a statement.

The more places Sierra can land Dream Chaser the more commercially viable it will be. For Cornwall, this strengthens its position as a spaceport, having already signed an agreement with Virgin Orbit to allow it to launch from there.

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Russia announces new tourist flight options to ISS

9:00 am

Capitalism in space: Russia has announced a range of new tourist flight options to ISS in an effort to compete against the new commercial tourist flights being offered by American companies.

Glavkosmos is offering space tourists the option of performing spacewalks from the International Space Station (ISS) and stays of up to 30 days aboard the orbital laboratory. They can even purchase the Soyuz space capsule that took them to and from the station.

The company, which is part of Roscosmos, recently upgraded its website to provide details of what paying customers can do when they book a trip to the station. The information is available in Russian and English.

You can see the English website here. It does not indicate what the prices are for these services, though it will have to be competitive with what SpaceX is charging in order to compete.

Side note: This story is on Doug Messier’s site Parabolic Arc, which is presently running a fund-raising campaign. Please consider donating. While Doug and I might disagree on many things, his work covering commercial space remains among the best on line.

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SpaceX’s focus shifts from Starship hops to the first near-orbital flight

8:48 am

Capitalism in space: Work at SpaceX’s Boca Chica spaceport in Texas has now definitely shifted away from doing Starship short hops, focusing instead on the first near-orbital flight using both Starship and Superheavy.

Not only is almost all recent work at Boca Chica centered on building the orbital launchpad with its tower for Superheavy, the company has apparently decided to end development of Starship prototypes 15-19, designed for hops only.

The fate of Starship SN15, following its milestone success with a smooth test flight and landing last month, is still unknown. It is likely awaiting preparations to go on display at Starbase. It is already sitting on display stands.

SN16 continues to reside in the High Bay, all but ready for rollout to the suborbital pad. However, that appears increasingly unlikely, as SpaceX focuses on the upcoming orbital attempt from the launch site next door to where SN15 completed its momentous test.

SN17’s fate is known, with sections of what was to become that Starship now observed as being scrapped at the Production Site.

Meanwhile, SN20’s aft dome [intended for orbit] has also been spotted by Mary (@bocachicagal), sporting three mounts for RVacs, indicating SN20 may be the first Starship to fly with both sea level and vacuum optimized engines.

All signs continue to suggest that orbital test flight will occur before the end of the summer.

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China rolls rocket to launchpad for first manned mission to station

8:39 am

The new colonial movement: China yesterday moved to the launchpad the Long March 2F rocket it will use to launch the first three astronauts to occupy its new space station.

The first element of the complex, the Tianhe core module, launched April 28 aboard a heavy-lift Long March 5B rocket, China’s most powerful launch vehicle. An unpiloted cargo ship, named Tianzhou 2, launched May 29 and docked with the Tianhe core module eight hours later, delivering fuel, food and spacesuits for the Shenzhou 12 astronauts.

The Shenzhou 12 mission will last about three months, the longest stay in space to date by Chinese astronauts. Shenzhou 12 will be China’s seventh crewed spaceflight since 2003.

Chinese officials have not announced the launch date for the Shenzhou 12 mission, but rockets for China’s last three crewed spaceflights rolled to the pad at Jiuquan about a week before liftoff. That suggests the launch could occur around June 16 or June 17.

As this launch will be from a spaceport in the interior of China, it will dump its first stage boosters on land.

During that three month mission the three astronauts will likely do several spacewalks to deploy solar panels and other equipment on the exterior of the Tianhe module, preparing it for later modules as well as the next manned mission, scheduled for October and planned to last six months.

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Ingenuity completes 7th flight on Mars

10:21 pm

Locations of Perseverance and Ingenuity on Mars
Click for interactive map.

Ingenuity yesterday successfully completed its 7th flight on Mars, heading south and landing exactly as planned.

Ingenuity lifted off around 12:34 local mean solar time on Tuesday, which corresponds to 11:54 a.m. EDT (1554 GMT). As planned, the chopper then traveled 348 feet (106 meters) south from its previous location on the floor of Mars’ Jezero Crater, staying aloft for nearly 63 seconds, JPL officials wrote in another tweet. The solar-powered rotorcraft set down at a new airfield, the fourth one it has reached since landing on the Red Planet with NASA’s Perseverance rover on Feb. 18.

Both the rover Perseverance and Ingenuity are traveling south on the floor of Jezero Crater, with the helicopter leapfrogging ahead every few weeks. On the map the red dot indicates Perseverance location, with the green dots Ingenuity’s last three landing sites. They have not yet added to the map exactly where Ingenuity landed yesterday (#7), so I have estimated it based on the information above.

The red outline indicates the region they are planning to explore over the next few months in order to gather a very thorough understanding of the geology of the floor of Jezero Crater. They will eventually head to the northwest towards the cliffs in the upper left, which is the foot of the large delta that flowed in the past into the crater through a gap in its western rim. The route they will take to get there however remains undetermined.

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Eroding Martian lava?

12:49 pm

Eroding Martian lava?
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on April 19, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Requested by Colin Dundas of the U.S. Geological Survey’s Astrogeology Science Center in Arizona, the image was entitled “Enigmatic Terrain in Elysium Planitia.” The image is labeled so because, as Dundas explained,

Flood lava is a key part of the feature, best seen at the north and south ends of the image. What’s unusual is the knobby terrain at the center. … I haven’t yet been able to do a more thorough study of these features, so plenty of puzzles remain!

The higher material in the upper right is likely flood lava. A 2016 paper [pdf] led by Dundas on similar features in Elysium Planitia that were not as knobby found their origin somewhat baffling. The evidence suggested that lava, mud, wind, and ice could all be involved in their formation, but the evidence was also not sufficient to eliminate any possibility.

In the case of today’s image, the explanation might also be any of these possibilities. For example, we might be looking at the erosion of the flood lava, exposing harder knobs of different material that had been there before and had been covered by the lava. Or maybe the knobs are simply the last bits of that layer of flood lava that has not yet eroded away.

As always, the overview map provides some context.
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Senate passes NASA authorization that calls for second lunar lander contract

9:33 am

The Senate today passed a new NASA authorization that requires the agency to award a second manned lunar lander contract in addition to the one it gave SpaceX for its Starship spacecraft.

The bill also recommended a $10 billion increase over five years in this specific lunar lander program to pay for that second contract.

None of this is law yet, as the House must agree also. In addition, as this is an authorization, not an appropriation, the extra money has not been appropriated, which means it does not yet exist. And should it be approved at these recommended numbers, it means that NASA will be forced to stretch out the creation of both lunar landers, as the money appropriated is still less than required to build either.

I suspect that this budget shortfall will not delay SpaceX’s Starship significantly, as that company has obtained sufficient private funding to build it regardless. More likely the second lunar lander will face longer delays, unless its builders decide to do what SpaceX has done, and obtain private capital to get it done fast.

Note too that this recommendations follows Congress’s general policy of imagining money grows on trees and that there is an infinite supply. While it might be a good idea to pay for two landers, the country’s debt suggests otherwise. Maybe a wiser course would be for the government to only offer a tiny percentage of the capital, and demand the builders find their own funding, as SpaceX has done.

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Juno takes first close-up images of Ganymede since 2000

9:21 am

Ganymede as seen by Juno
Click for full image.

Ganymede as seen by Juno
Click for full image.

On June 7th the Jupiter orbiter Juno made its first close fly-by of Ganymede, taking the first close-up images of this Jupiter moon since the orbiter Galileo flew past in 2000.

The first two images from NASA Juno’s June 7, 2021, flyby of Jupiter’s giant moon Ganymede have been received on Earth. The photos – one from the Jupiter orbiter’s JunoCam imager and the other from its Stellar Reference Unit star camera – show the surface in remarkable detail, including craters, clearly distinct dark and bright terrain, and long structural features possibly linked to tectonic faults.

…Using its green filter, the spacecraft’s JunoCam visible-light imager captured almost an entire side of the water-ice-encrusted moon. Later, when versions of the same image come down incorporating the camera’s red and blue filters, imaging experts will be able to provide a color portrait of Ganymede. Image resolution is about 0.6 miles (1 kilometer) per pixel.

In addition, Juno’s Stellar Reference Unit, a navigation camera that keeps the spacecraft on course, provided a black-and-white picture of Ganymede’s dark side (the side opposite the Sun) bathed in dim light scattered off Jupiter. Image resolution is between 0.37 to 0.56 miles (600 to 900 meters) per pixel.

Both images are to the right, each slightly reduced to post here. These images of this moon of Jupiter, the largest moon in the solar system and about 26% larger than the planet Mercury, reveal many of the same unsolved geological mysteries uncovered when the Galileo orbiter photographed it two decades ago. As I wrote in my Chronological Encyclopedia

Closer inspection of Ganymede revealed a strange topography, including patches of grooved terrain (not unlike the surface of a vinyl record) overlaying other patches of grooved terrain, the different patches oriented in random and totally unrelated directions. Moreover, the surface is overlain by bright and dark patches (the bright patches thought to be caused by water frost) that often had no apparent correspondence to topographical features. Planetary geologists could only scratch their heads in wonderment.

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