Tag: spaceflight

Study: Mars’ meandering canyons formed under ice

9:23 am

A new study comparing Mars’ meandering canyons with those found in the Arctic regions on Earth suggests that the Martian valleys were formed by water melting under large ice sheets, not flowing water on the surface.

A large number of the valley networks scarring the surface of Mars were carved by water melting beneath glacial ice, not by free-flowing rivers as previously thought, according to new research published in Nature Geoscience. The findings effectively throw cold water on the dominant “warm and wet ancient Mars” hypothesis, which postulates that rivers, rainfall and oceans once existed on the red planet.

To reach this conclusion, lead author and postdoctoral research scholar Anna Grau Galofre of Arizona State University’s School of Earth and Space Exploration developed and used new techniques to examine thousands of Martian valleys. She and her co-authors also compared the Martian valleys to the subglacial channels in the Canadian Arctic Archipelago and uncovered striking similarities. The western edge of the Devon ice cap on the Canadian Arctic Archipelago.

I have noted previously on Behind the Black my sense that the planetary science community was beginning to shift away from the hypothesis of flowing liquid surface water on Mars as an explanation for the planet’s riverlike and oceanlike features to some form or ice/glacial activity. For a half century the scientists have tried and failed to come up with some scenario that could allow water to flow on the surface in Mars’ cold climate and thin atmosphere.

Ice or glacial activity rather than flowing liquid water might solve this problem, and today’s paper is a push in this direction.

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Private Japanese lunar lander redesigned, flight delayed one year

8:37 am

Capitalism in space: The privately financed Japanese lunar landing company Ispace has redesigned its lander and delayed the first flight by one year, to 2022.

Since a preliminary design review in 2018, ispace has reduced the size of Hakuto-R. Previously 3.5 meters high and 4.4 meters wide with its landing legs deployed, the lander is now 2.3 meters high and 2.6 meters wide. The spacecraft’s mass has decreased from 1,400 to 1,050 kilograms, primarily by reducing the amount of propellant on board.

A smaller lander is less expensive to develop, said Ryo Ujiie, manager of the lander system engineering group at ispace, during a call with reporters July 30. It also reduces the size and complexity of the landing legs. The spacecraft will use a different trajectory to go to the moon, employing a low-energy transfer orbit that requires less propellant but takes roughly twice as long as previously planned. “We had to pick a more propellant-efficient orbit” given the reduction in propellant, said Chit Hong Yam, manager of the mission design and operations group. “We’re confident that, with enough checking, we should be able to execute this orbit.”

While the overall lander is smaller, it still maintains a payload capacity of 30 kilograms. Once on the surface, likely at one of several mid-latitude sites on the moon under consideration by ispace, it will operate for 12 days.

That first flight will launch on a Falcon 9. The company raised $95 million in private capital in 2017, and still plans a second lander launch in 2023.

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Endeavour safely splashes down

11:52 am

Splashdown of Endeavour

Capitalism in space: SpaceX’s Endeavour Dragon capsule has successfully splashed down in the Gulf of Mexico, returning two humans back to Earth safely after completing the first two month long manned commercial space mission.

If you go to the live stream to watch recovery operations, note that the boats and ships and persons involved are all property and employees of SpaceX. This is entirely an operation of the private company. The government is not involved, other than NASA’s justified monitoring as SpaceX’s customer.

One cool tidbit for the future. Endeavour is scheduled to fly again, in the spring of 2021. On that flight will be Megan McArthur, the wife of astronaut Bob Behnken, and she will likely sit in the same place he did on his flight.

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Russians sign deal to fly two tourists to ISS

10:30 am

Capitalism in space: Now that their Soyuz capsule is no longer required to fly NASA astronauts to ISS, the Russians have spare seats, and have now signed a deal with Space Adventures to fly two tourists to ISS in late 2021.

They will announce the tourist’s names later this year.

Space Adventures also has a deal with SpaceX to fly two tourists on a Dragon capsule on a week-plus long orbital mission (not docking with ISS). SpaceX also has a deal with the space station company Axiom to fly tourists to ISS. Next year could thus see two or three tourist flights to space.

Isn’t competition wonderful?

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Electrical disconnect caused Rocket Lab’s July 4th launch failure

6:21 pm

Capitalism in space: According to Rocket Lab’s investigation into the July 4th launch failure, an electric connection detached and cut off power to the upper stage, causing it to cease firing prematurely.

Once the electrical system disconnected in flight, it cut power from the rocket’s battery to the electric turbopumps on the Electron’s second stage Rutherford engine. That caused the engine to switch off prematurely around five-and-a-half minutes after the rocket took off from Rocket Lab’s launch base in New Zealand.

The early engine shutdown prevented the rocket from reaching the velocity necessary to enter a stable orbit around Earth, according to Peter Beck, founder and CEO of Rocket Lab, a small satellite launch company headquartered in Long Beach, California.

But telemetry continued streaming from the launch vehicle back to Rocket Lab’s control center in Auckland, New Zealand, allowing engineers to analyze data and determine the cause of the failure. The kerosene-fueled second stage engine shut down in a controlled manner, and the rocket coasted to an altitude of around 121 miles (195 kilometers) before re-entering the atmosphere and burning up.

Now that the company understands what caused the detachment, it will institute testing to make sure it doesn’t happen again. The fix however will not require any redesign of the rocket, and so they are targeting late August for their next launch, followed in September with the first launch from Wallops Island, Virginia. They also still expect to complete one launch per month through the end of the year.

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Jupiter’s south pole

10:59 am

The storms at the south pole of Jupiter
Click for full image.

Cool image time! The photo to the right, rotated and reduced to post here, was taken by Juno during its 28th close orbital fly-by of Jupiter, and then processed by citizen scientist Hemant Dara.

While not the first Juno image of the poles of Jupiter, this photo illustrates very well the evolution of the gas giant’s deep atmosphere as you move from the equator to the pole. From the equator to the high mid-latitudes the planet’s rotation, producing a day only 10 hours long, organizes that atmosphere into jet streams that form the bands that astronomers have spied from Earth since the first telescopes.

At the pole the influence of that rotation seems to wane, or at least influence the atmosphere differently, so that the storms seem to form randomly and incoherently.

The image also shows that there appear to be several types of storms at the south pole. Some appear as tight spirals, similar to hurricanes. Others appear chaotic, with no consistent shape, almost like clouds on Earth.

The processes that would explain all this are not yet understood, in the slightest, and won’t be until we get orbiters at Jupiter able to watch the atmosphere continuously, as we do here on Earth. Then it will be possible to assemble movies of the formation and dissipation of these storms, and begin (only begin) to decipher what causes them.

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Starship fifth prototype set for first 500 foot hop

10:39 am

Capitalism in space: SpaceX fifth Starship prototype has passed all of its static fire tests and is now ready for its first flight, a 500 foot vertical hop.

That hop should occur within days.

I have embedded a nice video that summarizes well all of the work being done right now at SpaceX’s Boca Chica facility in Texas, including the construction of large assembly buildings for both Starship and Super Heavy.
» Read more

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Yutu-2 completes 20th lunar day on Moon

10:28 am

The new colonial movement: The Chinese lunar rover Yutu-2 has completed its 20th lunar day on the farside of the Moon, and has now been put in sleep mode for the long lunar night.

Yutu 2 continued on its planned journey to the northwest of the lander, according to the China Lunar Exploration Program (CLEP). The rover covered 90 feet (27.64 meters) during the lunar day to make a total of 1,610 feet (490.9 m) of roving since setting down on the far side of the moon in January 2019.

The article at the link includes some images, including visual data from the ground-piercing radar that suggests at least four layers in the lunar subsurface.

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Manned Dragon return on August 2nd threatened by weather

4:08 pm

Capitalism in space: The splashdown of SpaceX’s first manned Dragon capsule Endeavour on August 2nd is now threatened by weather.

Isaias officially became a named tropical storm on Wednesday night, when its wind speeds exceeded 39 mph. The storm could affect several landing areas just as Endeavour is supposed to reenter Earth’s atmosphere, deploy its parachutes, and splash into the Atlantic Ocean or Gulf of Mexico.

Three of the seven landing zones that SpaceX and NASA prescribed for the test mission, called Demo-2, lie within the “cone of probability” for the storm’s path. Those splashdown sites are located off the coasts of Cape Canaveral, Daytona, and Jacksonville, according to NASA. A July 30 map shows NASA and SpaceX’s landing zones for the Crew Dragon Demo-2 mission amid the estimated path and conditions of Tropical Storm Isaias. The outer-edge green shows a 5-10% chance of sustained tropical storm-force winds. Google Earth; NOAA; NASA; Business Insider

Depending on how large the storm grows and how nasty weather conditions become, mission managers may scrub the undocking and landing attempt. Steep waves, rain, lightning, low clouds, poor visibility (for helicopters to fly the astronauts from a SpaceX recovery boat back to land), or even winds stronger than about 10 mph can trigger a “no-go” decision.

At the moment they are go for undocking on August 1st and splashdown the next day, but that could change depending on how the weather changes.

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Russia’s Proton rocket launches two communication satellites

2:44 pm

Russia today successfully launched two communications satellites into orbit using its Proton rocket.

This was the first Proton launch in 2020, after Roscosmos discovered in April problems with three rockets that required them to be sent back to their manufacturer.

The leaders in the 2020 launch race:

18 China
11 SpaceX
9 Russia
4 ULA
3 Japan

The U.S. still leads China 19-18 in the national rankings.

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Perseverance’s planned journey in Jezero Crater

1:34 pm

Jezero Crater delta
Jezero Crater delta

If all goes right, on February 18, 2021 the rover Perseverance will gently settle down onto the floor of Jezero Crater on Mars. The image to the right is probably the most reproduced of this site, as it shows the spectacular delta that some scientists believe might be hardened mud that had once flowed like liquid or lava from the break in the rim to the west.

They hope to put Perseverance down to the southeast of that delta, as shown in the overview map below.
» Read more

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House rejects Artemis; Senate funds Artemis

11:51 am

The Senate gives, the House taketh away: Even as the Democratically-controlled House continues to refuse the Trump administration’s request for $2.6 billion to fund its 2024 manned lunar landing, the Republican-controlled Senate has provided $1.6 billion of those funds in the next COVID-19 stimulus package.

This illustrates why such stimulus packages are utterly corrupt. Much of the money allocated has little to do with helping the country recover from the Wuhan panic, but is instead earmarked for the favorite agencies of the politicians. The Republicans are also trying to use this package to sneak across funding for Artemis without the House Democrats noticing, or being able to object.

It remains to be seen whether that strategy will work. Either way, we continue on the road to bankruptcy and financial collapse, as the federal government is trillions in debt, and simply doesn’t have the money for any of this.

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Live stream of Perseverance launch tomorrow

8:13 pm

I have embedded below the fold NASA’s live stream channel for tomorrow’s 7:50 am (Eastern) launch of the Perseverance rover to Mars on a ULA Atlas-5 rocket.

At present the channel is carrying NASA’s programming leading up to the launch. The actual live stream for the launch begins at 7 am (Eastern).

The weather looks good, and there appear to be no issues, as of 11 pm (Eastern).

» Read more

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Glacier country on Mars

12:47 pm

Glacial flow in Protonilus Mensae
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on May 24, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO), and provides a wonderful example of the kind of evidence of buried glaciers found extensively in the mid-latitudes of Mars.

This particular region, called Protonilus Mensae, is a region of chaos terrain at the transition zone between the southern cratered highlands and the northern lowland plains. I have featured a number of cool images in Protonilus, all of which show some form of buried glacial flow, now inactive.

The last cool image above was one that the MRO science team had picked to illustrate how to spot a glacier on Mars.

In this particular image are several obvious glacier features. First, we can see a series of moraines at the foot of each glacier in the photo, each moraine indicating the farthest extent of the glacier when it was active and growing. It also appears that there are two major layers of buried ice, the younger-smaller layer near the image’s bottom and sitting on top of a larger more extensive glacier flow sheet. This suggests that there was more ice in the past here, and with each succeeding ice age the glaciers grew less extensive.

Second, at the edges of the flows can be seen parallel ridges, suggestive also of repeated flows, each pushing to the side a new layer of debris.

Third, the interior of the glacier has parallel fractures in many places, similar to what is seen on Earth glaciers.

Protonilus Mensae, as well as the neighboring chaos regions Deuteronilus to the west and Nilosyrtis to the east, could very well be called Mars’ glacier country. Do a search on Behind the Black for all three regions and you will come up with numerous images showing glacial features.

Below is an overview of Protonilus, the red box showing the location of this image. Also highlighted by number are the locations of the three features previously posted and listed above.
» Read more

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NASA announces third Dragon flight crew

9:31 am

NASA today announced four-person Dragon flight crew for that spacecraft’s third flight in the spring, the second official operational flight.

NASA astronauts Megan McArthur and Shane Kimbrough will join JAXA’s Akihiko Hoshide and ESA’s Thomas Pesquet on that flight, which will follow Crew-1 currently scheduled for sometime in late September after Demo-2 concludes. This is a regular mission, meaning the crew will be staffing the International Space Station for an extended period – six months for this stretch, sharing the orbital research platform with three astronauts who will be using a Russian Soyuz spacecraft to make the trip.

Pesquet will be the first European to fly on Dragon. McArthur however is more interesting, in that this will be her first spaceflight in more than a decade. She had previously flown only once before, in 2009 on the last Hubble repair mission. She is also the wife of Bob Behnken, who is on ISS right now having flown on the first Dragon manned mission now preparing for its return to Earth on August 2nd.

The long gap in flights was certainly due to the shuttle’s retirement. Why she didn’t fly on a Soyuz is a question some reporter should ask her at some point.

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Martian eroding ridges amid brain terrain

12:09 pm

Brain terrain and bisected ridges on Mars
Click for full image.

Today’s very cool image is cool because of how inexplicable it is. To the right, cropped to post here, is a photo taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO) of an area of what they call “Ribbed Terrain and Brain Terrain”.

I call it baffling.

Nor am I alone. At the moment the processes that create brain terrain (the undulations between the ridges) remain a complete mystery. There are theories, all relating to ice sublimating into gas, but none really explains the overall look of this terrain.

Making this geology even more baffling are the larger ridges surrounding the brain terrain, all of which appear to have depressions along their crests. Here too some form of sublimation process appears involved, but the details remain somewhat mysterious.
» Read more

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Northrop Grumman about to launch second mission extension robot

10:20 am

Capitalism in space: The success of Northrop Grumman’s first Mission Extension Vehicle (MEV-1) to dock with a dead communications satellite and bring it back to life has set the stage for the second MEV, set for launch on an Ariane 5 before the end of the month.

For MEV-1’s mission, Intelsat decommissioned the 901 satellite and moved it up into the GEO graveyard for rendezvous and docking operations.

However, the main result of the excellent performance of MEV-1 and a full demonstration of the docking and capture process is that MEV-2 will not be required to rendezvous with its target in the GEO graveyard. Nor will the satellite be deactivated. Instead, MEV-2 will move directly to the main operational GEO belt and approach Intelsat 10-02 while the satellite is still actively relaying telecommunications. “Intelsat has confirmed their desire on the next MEV, MEV-2, to do the docking directly in GEO orbit. They will be maintaining customer traffic as we do the docking with MEV-2,” noted Mr. Anderson.

This new approach, which was always the goal for future MEV operations, was aided in large part by confirmation to a high degree of accuracy that all of MEV’s systems worked as planned during Intelsat 901 operations.

The article notes that this concept could even be extended to sending a robot to Hubble to provide it accurate pointing capability when its last gyroscopes finally fail, thus extending the life of that space telescope even farther beyond its original planned fifteen year lifespan that ended in 2005.

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