Tag: engineering

New computer simulation of theorized impact that created the Moon

8:56 am

The uncertainty of science: Before I even begin to describe this story, I must emphasize that it is pure science fiction. As much as it is founded on known data, that data is simply not sufficient to tell us exactly how the Moon was created. The data merely points to many hundreds of possibilities, of which the model below is simply one:

Computer programmers using a supercomputer at a United Kingdom university have created a new simulation of the theorized impact of a Mars-sized body to the Earth that some believe created the Moon, and determined it was possible for that impact to have created the Moon quickly, within hours.

You can read the research paper here.

The fun part of this story is to watch the video of this simulation, which I have embedded below. Whether it describes what actually happened is pure speculation, and in fact cannot be confirmed in any way at all.

It is intriguing, nonetheless.
» Read more

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China launches solar science telescope

1:46 pm

China today used its Long March 2D rocket to launch its first solar science telescope, Advanced Space-borne Solar Observatory (ASO-S), also known as Kuafu-1.

The probe, which was first proposed in 1976 (!), has a four year nominal mission and is designed to monitor the Sun as goes through its next sunspot maximum. More information can be found here.

The leaders in the 2022 launch race:

46 SpaceX
43 China
12 Russia
8 Rocket Lab
7 ULA

American private enterprise still leads China 66 to 43 in the national rankings, and the entire globe combined 66 to 63.

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SpaceX launches two Intelsat communications satellites

4:17 pm

Capitalism in space: SpaceX today successfully launched two Intelsat communications satellites using its Falcon 9 rocket.

The first stage completed its fourteenth flight, landing successfully on a drone ship in the Atlantic.

The leaders in the 2022 launch race:

46 SpaceX
42 China
12 Russia
8 Rocket Lab
7 ULA

American private enterprise now leads China 66 to 42 in the national rankings, and the entire globe combined 66 to 62.

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InSight shut down temporarily because of lack of power

10:14 am

InSight's power levels over recent time

Because a dust storm has caused a further decline in the power being generated by InSight’s solar panels, the science team has decided to put the lander into safe mode for the next two weeks in the hope that the air will then clear, allowing its power levels to rise.

The graph to the right shows that drop. From the press release:

By Monday, Oct. 3, the storm had grown large enough and was lofting so much dust that the thickness of the dusty haze in the Martian atmosphere had increased by nearly 40% around InSight. With less sunlight reaching the lander’s panels, its energy fell from 425 watt-hours per Martian day, or sol, to just 275 watt-hours per sol.

InSight’s seismometer has been operating for about 24 hours every other Martian day. But the drop in solar power does not leave enough energy to completely charge the batteries every sol. At the current rate of discharge, the lander would be able to operate only for several weeks. So to conserve energy, the mission will turn off InSight’s seismometer for the next two weeks.

The real problem however is the dust covering the solar panels. If that dust gets thicker due to this storm, the lander will not recover when they power it up in two weeks. It will still generate electricity at this low number, making future operations likely impossible.

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Engineers regain full control of CAPSTONE

9:21 pm

After a month of careful tests and analysis, engineers today successfully regained full control of the CAPSTONE lunar orbiter, on its way to the Moon.

The most likely cause of the anomaly was identified as a valve related issue on one of the spacecraft’s eight (8) thrusters. The partially open valve resulted in thrust from the associated thruster whenever the propulsion system was pressurized. To attempt a recovery from this condition, the mission team conducted multiple tests on the vehicle and evaluated extensive telemetry and simulation data and then formulated a plan for attempting recovery of the vehicle’s full 3-axis control.

This recovery sequence was uploaded to the spacecraft yesterday (Thursday) and was executed early this morning (Friday 10/7). Initial telemetry and observation data after the recovery attempt points to a successful recovery of the system which has now regained 3-axis attitude control. The updated spacecraft attitude has oriented the spacecraft solar arrays to the Sun and implemented an orientation for the downlink antennas which significantly improves data downlink performance as compared to the pre-recovery attitude.

The spacecraft is not out of the woods yet. The engineers still need to figure out how to do future course corrections with “the possible presence of a valve that remains partially open.”

Nonetheless, that they have successfully regained full control means they have a very good handle on the issue, which bodes well for the lunar orbital insertion maneuver on November 13, 2022.

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Thick flow exiting dramatic canyon on Mars

1:22 pm

Thick flow into Mamers Valles on Mars
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken on July 24, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what the scientists label as a “viscous flow” that has apparently carved the wide curving canyon as it slowly flows into open country to the south.

I would estimate the height of that canyon wall to be around 3,000 feet, though this is a very rough guess. I also image a trail switchbacking up the nose of that canyon wall would make for a truly stupendous hiking experience.

The flow filling the canyon floor appears very glacial, which is not surprising as this canyon is at 37 degrees north latitude, in the mid-latitude band where many glacial features are found. The overview map below provides some more detailed context.
» Read more

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China’s Long March 11 launches from floating sea platform

11:26 am

China today successfully launched two “navigation satellites” from a floating sea platform in the Yellow Sea, using its Long March 11 rocket.

The platform was only about two miles off shore at launch, so the view from the beach drew a large crowd. Video at the first link.

The leaders in the 2022 launch race:

45 SpaceX
42 China
12 Russia
8 Rocket Lab
7 ULA

American private enterprise still leads China 65 to 42 in the national rankings, and the entire globe combined 65 to 62. These numbers will change again later today, with a SpaceX commercial launch scheduled for 4:06 pm (Pacific).

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Rocket Lab successfully launches NOAA satellite

10:34 am

Capitalism in space: Rocket Lab today successfully used its Electron rocket to place a NOAA satellite into orbit, designed to gather data from ground-based sensors.

This was the company’s eighth successful launch in 2022, the most it has achieved in any single year. No attempt was made to recover the first stage on this launch.

The leaders in the 2022 launch race:

45 SpaceX
41 China
12 Russia
8 Rocket Lab
7 ULA

American private enterprise now leads China 65 to 41 in the national rankings, and the entire globe combined 65 to 61. The 65 successful launches so far this year is now the second most successful American year in rocketry, exceeded only by the 70 launches in 1966. With almost three months left to go in the year, 2022 looks like it will top that record, by a lot.

SpaceX meanwhile has a launch scheduled for later today, after getting scrubbed yesterday at T-30 seconds because of detected minor helium leak.

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Endurance docks at ISS

9:16 am

Like clockwork SpaceX’s Endurance capsule successfully docked at ISS yesterday, delivering four astronauts to the station for a six month mission.

The most interesting aspect of this launch and crew is Russian Anna Kikina.

Kikina is the first Russian to fly aboard a U.S. spacecraft in nearly 20 years. She and Rubio were launched under a new agreement between NASA and Roscosmos, the Russian space agency, that ensures at least one astronaut or cosmonaut is always aboard the space station even if a Crew Dragon or Soyuz is forced to depart early, taking its crew with it.

Without the seat-swap arrangement, a medical emergency or some other major problem could leave an all-Russian or all-NASA crew aboard without the expertise to operate the other nation’s systems.

The agreement had been stalled almost entirely by the former head of Roscosmos, Dmitry Rogozin. He is now gone however, sent by Putin to take over the fake occupation government in parts of the Ukraine. It appears his bellicose manner, that caused the loss of a billion dollars in launch contracts with OneWeb, was more than even Putin could handle.

With him gone, the new head of Roscosmos, Yuri Borisov, quickly finalized this astronaut barter deal. He has also publicly acted to try to ease tensions between the U.S. and Russian space agencies.

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Startup smallsat rocket company signs spaceport deal with Brazil

9:02 am

The new colonial movement: A Canadian startup smallsat rocket company, C6 Launch Systems, has not only signed a spaceport deal with Brazil to build its own launchpad at that country’s Alcantara Space Center, it has also won its first launch customer.

First, the launchpad is for C6’s rocket, which is unnamed and designed to launch cubesats. The company webpage says they are aiming for suborbital flights in 2021 and orbital flights in 2022, but it is unclear if it has launched anything at this point.

Nonetheless, Brazil is very clearly teaming up with C6. The Brazilian air force hired it to build a launch pad, a Brazilian company, Concert Technologies, has awarded it a launch contract.

Concert Technologies S.A. who are developing a new small satellite constellation have signed a a non-exclusive letter of intent to launch three small satellites with C6 Launch. The broad agreement allows for Concert Technologies to schedule more launches to maintain and expand their high-resolution Earth Observation (EO) constellation.

It appears Concert’s satellites will be targeting both the Earth imagery market as well as communications services in the “internet of things.”

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October 6, 2022 Quick space links

3:43 pm

Courtesy of BtB’s stringer Jay.

 

 

 

 

 

 

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Martian crater and mesa sculpted by ancient flow

1:14 pm

Martian crater and mesa sculpted by ancient flow
Click for full image.

Cool image time! The picture to the right, rotated, cropped, and reduced to post here, was taken on June 15, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a crater whose ejecta has been sculpted to the east into a teardrop-shaped mesa by some ancient flow, coming from the west.

The crater itself is located in one of several outflow canyons draining out from the volcanic Tharsis Bulge into the northern lowland plain of Chryse Planitia, the biggest of which is Valles Marineris. This particular canyon is one of the smaller and is dubbed Ravi Vallis.

The overview map below illustrates why many scientists think the flow that shaped this mesa came from a catastrophic flood of liquid water, billions of years ago.
» Read more

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Engineers still struggling to regain full control of CAPSTONE

10:50 am

Though its batteries are now getting charged by the Sun, engineers have still not regained full control of the smallsat lunar orbiter CAPSTONE, presently on its path towards the Moon.

As per the latest update:

The CAPSTONE mission team is continuing to work towards recovery of the spacecraft full three-axis control. This work includes collecting information from the spacecraft, running simulations, and refining recovery plans. The vehicle remains stable and power positive in its current configuration.

In other words, they’ve got the spacecraft oriented so that its solar panels can gather enough sunlight to charge the batteries, but its attitude remains incorrect and they do not yet have CAPSTONE fully under their control.

The spacecraft arrives in lunar orbit on November 13, 2022. At that time however it will have to do an engine burn to enter lunar orbit, and if full control is not regained by then this burn will not be possible because engineers will not be able to point it correctly.

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Falcon Heavy to finally launch again?

8:57 am

After three years of delays due to payload issues, it now appears that the next Falcon Heavy launch will likely occur near the end of October.

The tentative date is October 28th, but this is not yet confirmed. Though a manifest of a half dozen Falcon Heavy launches has existed since 2019, and most were originally scheduled for launch in 2020-2021, none has taken place, all supposedly because of payload delays not issues with the rocket itself.

SpaceX officials are now saying that it plans to complete six Falcon Heavy launches within the next twelve months. Two are for the military, three for commercial communications companies, and the last is the Psyche mission for NASA. This last launch is delayed because of software issues discovered in June, only a few weeks before launch. Whether it can fix these issues in time for a new July 2023 launch window remains questionable.

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Satellite about to burn up because Sherpa orbital tug has done nothing

8:46 am

Capitalism in space: A Boeing cubesat satellite launched last month is about to burn up as it returns to Earth because the Spaceflight Sherpa orbital tug that was supposed to raise its orbit has as yet done nothing.

Spaceflight planned to use a chemical propulsion system on the Sherpa, provided by Benchmark Space Systems, to raise the orbit of the vehicle to an altitude of 1,000 kilometers. The Sherpa payload, initially not disclosed by Spaceflight, is a V-band communications demonstration by Boeing called Varuna.

However, tracking information from the U.S. Space Force shows that Sherpa has yet to raise its orbit. Atmospheric drag has caused that orbit to gradually decay, and the spacecraft was most recently tracked in an orbit of 283 by 296 kilometers. That raised concerns that the spacecraft could reenter in a matter of weeks if it does not start firing its thrusters.

Spaceflight officials explain the lack of action is because they are still “commissioning” the tug, whatever that means. It also appears that problems was this same propulsion system caused SpaceX to ban Spaceflight in March as a customer on future rideshare launches.

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SpaceX launches another 52 Starlink satellites

4:19 pm

Capitalism in space: SpaceX this afternoon successfully completed its second Falcon 9 launch of the day, placing 52 Starlink satellites into orbit from Vandenberg..

The seven hour gap between launches was a record for the shortest time between two SpaceX launches. The first stage landed successfully on a drone ship in the Pacific, completing its fifth flight.

The leaders in the 2022 launch race:

45 SpaceX
41 China
12 Russia
7 Rocket Lab
7 ULA

American private enterprise now leads China 64 to 41 in the national rankings, and the entire world combined 64 to 61. The U.S. total, 64, ties the total from 1965, the second most active year in American rocketry. The record of 70 successful launches, set in 1966, will almost certainly be broken sometime in the next month.

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Another “What the heck?” formation on Mars

2:32 pm

Another
Click for full image.

Cool image time! The photo to the right, cropped, reduced, and enhanced to post here, was taken on May 28, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO), and shows what the scientists label “unique terrain.”

I have increased the contrast to bring out the details. It appears that we have a flat plain of criss-crossing ridges that in large areas have somehow gotten flattened across their top. Imagine someone laying plaster on a wall and using a scraper tool to smooth the surface, but only partially. In this case on Mars, our imaginary worker only smoothed the surface a little, and only in some areas. To try to come up with a geological process however to explain this seems daunting.

And what created the criss-crossing ridges? The overview map provides only a little help in answering these questions.
» Read more

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October 5, 2022 Quick space links

1:51 pm

Courtesy of BtB’s stringer Jay, who reads Twitter so I don’t have to.

 

 

 

 

 

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Firefly wins Space Force launch contract

11:13 am

Capitalism in space: Shortly after Firefly completed the first successful orbital launch of its Alpha rocket, the U.S. Space Force awarded the company its first military launch contract.

The VICTUS NOX mission will demonstrate an end-to-end Tactically Responsive Space capability, including the launch segment, space segment, ground segment, and on-orbit operations. VICTUS NOX will perform a Space Domain Awareness (SDA) mission from Low-Earth Orbit (LEO).

The next Alpha mission, a demonstration launch of a climate smallsat for NASA, presently hopes to launch before the end of the year, though more likely early next year.

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Virgin Orbit ready to launch from Cornwall, United Kingdom

9:57 am

Capitalism in space: Virgin Orbit announced today that it has completed its preparations for its first launch from Cornwall, United Kingdom, which would also be the first launch ever from British soil.

An actual launch date has not yet been set, due to the “launch permitting regulatory process” in the UK. At the moment Cornwall is vying with two new spaceports in Scotland for the honor of that first launch.

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SpaceX successfully launches astronauts to ISS

9:40 am

Capitalism in space: SpaceX this morning successfully launched two NASA astronauts, one Japanese astronaut, and one Russian astronaut into orbit for a mission to ISS, with the docking scheduled for tomorrow.

The capsule, Endurance, is making its second flight. This was SpaceX’s eighth manned launch. The first stage, making its first fight, landed successfully on the drone ship in the Atlantic. This was the first new first stage launched since May 2022, and only the second this year. All other launches in 2022 were completed using SpaceX’s existing fleet of boosters. The company also continues to hold to the pattern of last year for maintaining that fleet, by adding two new boosters each year.

That this achievement is now becoming as routine as SpaceX’s unmanned launches proves the company’s success. And SpaceX did it in less than a decade, something NASA with its government-built shuttle was never able to accomplish.

The leaders in the 2022 launch race:

44 SpaceX
41 China
12 Russia
7 Rocket Lab
7 ULA

American private enterprise now leads China 63 to 41 in the national rankings, and the entire world combined 63 to 61.

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ULA successfully launches two communications satellites

2:49 pm

Capitalism in space: ULA today successfully used its Atlas-5 rocket to place two SES communications satellites into orbit.

Satellite deployment will occur in about five hours, after the rocket gets them to their proper geosynchronous orbit.

43 SpaceX
41 China
12 Russia
7 Rocket Lab
7 ULA

American private enterprise now leads China 62 to 41, and the entire globe combined 62 to 61. This lead will grow before the week is out. SpaceX has scheduled two launches on October 5th, first a manned mission to ISS followed a few hours later by an unmanned launch of 52 Starlink satellites. Rocket Lab follows on October 6 with another Electron launch.

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October 4, 2022 Quick space links

2:41 pm

 

 

 

  • Iran completes suborbital rocket test launch

    • According to the state-run press, the rocket, dubbed Saman, tested an “orbital transmission system and … its capability to change the orbit of satellites in near-space conditions.”

 

 

 

 

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Chandra takes an X-ray look at early Webb infrared observations

9:54 am

Chandra's X-ray vision of the Cartwheel Galaxy
Chandra’s X-ray view of the Cartwheel Galaxy

Webb's view of the Cartwheel Galaxy
Webb’s infrared view of the Cartwheel Galaxy
Click for full image.

Hubble's optical view of the Cartwheel Galaxy
Hubble’s optical view of the Cartwheel Galaxy. Click for original image.

Astronomers have now taken X-ray images using the orbital Chandra X-ray Observatory of four of the first Webb Space Telescope observations. The four targets were the Cartwheel Galaxy, Stephan’s Quintet, galaxy cluster SMACS 0723.3–7327, and the Carina Nebula.

The three images to the right illustrate the importance of studying astronomy across the entire electromagnetic spectrum. Each shows the Cartwheel Galaxy as seen by three of the world’s most important space-based telescopes, each looking at the galaxy in a different wavelength.

The top picture is Chandra’s new X-ray observations. As the press release notes,

Chandra data generally show higher-energy phenomena (like superheated gas and the remnants of exploded stars) than Webb’s infrared view. … X-rays seen by Chandra (blue and purple) come from superheated gas, individual exploded stars, and neutron stars and black holes pulling material from companion stars.

The middle picture was produced by Webb, shortly after the start of its science operations. It looks at the galaxy in the infrared.

In this near- and mid-infrared composite image, MIRI data are colored red while NIRCam data are colored blue, orange, and yellow. Amidst the red swirls of dust, there are many individual blue dots, which represent individual stars or pockets of star formation. NIRCam also defines the difference between the older star populations and dense dust in the core and the younger star populations outside of it.

The bottom picture was taken by the Hubble Space Telescope in 1995. I have rotated the image to match the others. It looks at the galaxy in optical wavelengths, the wavelengths that our eyes perceive.

Note how bright the central galactic region is in the infrared and optical, but is invisible in X-rays. Chandra is telling us that all the most active regions in the Cartwheel are located in that outer ring, not in its center.

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Spinlaunch completes 10th test launch, this time for outside customers

9:15 am

Spinlaunch prototype launcher

Capitalism in space: Spinlaunch on September 27, 2022 successfully completed the 10th test launch of its radical spin launch centrifuge, this time accelerating test components to approximately 35k feet for other potential customers, including NASA.

Flight Test 10, which had a similar flight trajectory as previous campaigns, was witnessed by more than 150 partners, government officials, and industry advocates. It was SpinLaunch’s tenth flight test in just under eleven months since the Suborbital Mass Accelerator came online in late 2021.

…Four partner payloads, as well as two instrumentation payloads, were flown on the Suborbital Accelerator Flight Test Vehicle. For partners, the flight test provided critical data on the launch environment and payload integration process.

As part of the pre-flight qualification process, SpinLaunch accelerated payloads up to 10,000G in SpinLaunch’s 12-meter Lab Accelerator at its Long Beach headquarters. Payloads were inspected post-spin and subsequently integrated into the Flight Test Vehicle in preparation for Flight Test 10.

It remains to be seen whether this technology will work for launches to orbit. Even if it does, because of the stress produced during spin up this launch technique will really only work for bulk payloads to orbit, such as water and oxygen. If it works however it could reduce launch costs for these items tremendously.

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October 3, 2022 Quick space links

1:09 pm

All but the first provided by stringer Jay, who trolls Twitter so I don’t have to. A lot of launches by the U.S. in the next four days.

 

 

 

  • Rocket Lab targeting October 6, 2022 for its next launch

    • It will place a NOAA satellite into orbit. The company will not attempt a recovery of the rocket’s first stage. That same day SpaceX also has a launch planned, the third for the company in a little more than three days.

 

 

Based on numerous sources, including at least one owner of a payload, this is not true. The second stage under performed. Instead of a 300 kilometer orbit, the second stage deployed at a lower orbit, either 223×283 kilometers, or 210×270 kilometers, depending on source. (The latter is likely more accurate, as it is more recent.)

Not a good look for new CEO Weber, or Firefly. The under performance is something that can be fixed. To make believe it didn’t happen only makes you look disingenuous and unable to face reality.

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Two days after DART’s impact of Dimorphus, ejected dust extends like a comet tail out more than 6,000 miles

12:23 pm

Dust tail from Dimorphus two days after DART impact
Click for full image.

Using a telescope in Chile, astronomers photographed the ejecta two days after the impact of DART into the 525-foot-wide asteroid Dimorphus, and detected a tail of dust extending out more than 6,000 miles.

The picture to the right, cropped and reduced to post here, shows that tail.

In this new image, the dust trail — the ejecta that has been pushed away by the Sun’s radiation pressure, not unlike the tail of a comet — can be seen stretching from the center to the right-hand edge of the field of view. … At Didymos’s distance from Earth at the time of the observation, that would equate to at least 10,000 kilometers (6000 miles) from the point of impact.

Didymos is the larger parent asteroid that Dimorphus orbits.

It is still too soon to get the numbers on how Dimorphus’s path in space was changed by that impact. In fact, we still really don’t have a clear idea what is left of Dimophus itself. The ejecta cloud needs to clear somewhat to see what’s hidden inside it.

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Europa in true color

9:37 am

Europa in true color
Click for full image.

The photo to the right, cropped and reduced to post here, was taken on September 29, 2022 by the Jupiter orbiter Juno during its close fly-by of Europa. Citizen scientist Bjorn Jonsson has processed it to bring out the details. From his caption:

This is an approximately true color/contrast, reprocessed version of Europa image PJ45_1. It is more carefully processed than the version I posted very shortly after the raw image data was released. The color should be fairly close to Europa’s real color and probably slightly more accurate than the color of the earlier version I posted. North is up.

The Sun is coming from the right, so those are craters in the upper left, close to the shadowed limb of the planet. The red color has been known for decades, and appears in many cases to be seepage coming up from the many meandering ridges that criss-cross the planet’s surface. Their chemistry/make-up is not fully known at this time.

Juno came within 219 miles of Europa, the closest any spacecraft has come since the Galileo orbiter circled Jupiter in the 1990s. I was expecting close-up images of the surface, from that close distance, but have not yet seen any. Instead, most of the images released and processed by citizen scientists have been global images from farther away. Thus, at this moment it does not appear Juno took pictures at this closest distance.

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Tiny cobbles on Mars

9:16 am

Tiny cobbles on Mars

Our second cool image takes us from grand galaxies, one of the universe’s largest coherent objects, to tiny cobbles on Mars. The picture to the right, taken by one of Perseverance’s close-up cameras on September 29, 2022, covers an area less than an inch across, making the largest rounded pebbles in this image only a few millimeters in size.

The rover presently sits on the floor of Jezero Crater, at the base of the delta that flowed into that crater eons ago. The data suggests that delta was created by flowing water entering a lake that filled the crater.

Did flowing water create these cobbles? These pebbles all have the look of the rounded cobble one finds either in river beds, or in glacial moraines. In both cases, the flow of the water or ice rolls the rocks along until they become rounded.

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Interacting galaxies

9:02 am

Interacting galaxies
Click for full image.

The news is light this morning, so this cool image will be the first of three. The picture to the right, cropped and reduced to post here, was taken by the Hubble Space Telescope and released today. From the caption:

The two interacting galaxies making up the pair known as Arp-Madore 608-333 seem to float side by side in this image from the NASA/ESA Hubble Space Telescope. Though they appear serene and unperturbed, the two are subtly warping one another through a mutual gravitational interaction that is disrupting and distorting both galaxies.

I did a search for any research of this galaxy pair, and found that its identification was only part of a larger survey, with only a little research done on its spectroscopy. Thus, I can’t tell you the size or distance, or how far apart from each other these galaxies lie.

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