Tag: spaceflight

China’s Long March 5B rocket with new space station module is now at launchpad

10:16 am

China’s Long March 5B rocket had now been rolled out to its launchpad, carrying the new Mengtian module for China’s Tiangong-3 space station.

The launch is presently scheduled for October 31, 2022. Assuming China has not upgraded the engines on the rocket’s core stage, that stage will tumble back to Earth, uncontrolled, sometime in the following week. Since it is large enough to survive re-entry, it will hit the ground, thus threatening every habitable location under its orbital path. By allowing this to happen China violates the Outer Space Treaty, to which it is a signatory.

Nor will this likely be the last time China does this. Though this module completes China’s station, as presently designed, this will not be the last Long March 5B launch. China plans to use it put its Hubble-class space telescope into orbit, as well as other things.

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Relativity edges closer to first launch

9:59 am

Relativity has begun stacking its Terran-1 rocket with a goal of soon rolling it out to the launchpad for static fire tests.

The launch date itself remains uncertain. Though the company hopes to lift-off before the end of the year, it also has not committed to that goal.

“We are confident in our tech readiness to launch this year, and we’re still marching toward that,” Ellis said. “But there are a few external factors as we’re getting close to the end of the year that could impact the timeline for us. It’s not a guarantee, but it could.”

Those external factors include other spaceport users in Florida, including uncertainty around the mid-November launch of NASA’s Space Launch System rocket, and blackout periods as part of the military’s Holiday Airspace Release Plan. This effectively precludes launches around Thanksgiving, Christmas, and New Year’s Day due to the high volume of airline flights.

Ellis said the company is progressing well toward securing a launch license for “Good Luck Have Fun,” and noted that the Federal Aviation Administration accepted its methodology for debris mitigation as well as its trajectory analysis software.

The article at the link adds some additional details about the company’s plans. This Terran-1 rocket appears to be its equivalent of SpaceX’s Falcon-1. The company plans to quickly replace it with its much larger Terran-R rocket, comparable to the Falcon-9 in power and price. And it already has won $1.2 billion in launch contracts, and hopes to launch within two years.

I wonder if Terran-R will launch before Blue Origin’s much touted but repeatedly delayed New Glenn rocket. The article itself appears to think so, since it focuses entirely on the competition between SpaceX and Relativity, as if Blue Origin and New Glenn do not even exist.

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ISS dodges space junk from Russia’s November 2021 anti-satellite test

9:46 am

In order for ISS to avoid one of the approximately 585 pieces of space junk still in orbit that were produced when Russia destroyed its defunct Cosmos 1408 satellite in a November 2021 anti-satellite test, engineers fired the engines of a docked Progress freighter yesterday for just over five minutes.

Without the burn the debris would have flown within three miles of the station, too close for comfort or anyone’s margin of error.

According to a report in September, of these 585 pieces, most will burn up in the atmosphere by ’25, with only 38 pieces left afterward to pose a threat to other operating satellites and manned spacecraft.

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Researchers figure out how to make the Starlink constellation a GPS-type constellation

9:37 am

Researchers working independent from SpaceX and without any of the company’s proprietary data, have found a way to turn the Starlink internet constellation — now about 3,000 satellites strong — into a method of pinpointing one’s location, thus making it an alternative to GPS-type satellites.

To be clear, no one is accessing Starlink user data here. The sync sequences are just strings of timings and other data that the machines use to stay in touch — the payload data is entirely separate.

In the paper, due to the fact that the signal was being targeted at an actual Starlink user terminal, the location had to be for that terminal too, and they were able to get it within 30 meters. Not better than GPS, obviously, but it could be quicker and eventually more accurate if SpaceX were to give the project its blessing.

A software update that slightly adjusts how the satellites send their signals and a bit of data on correcting for variance between their clocks, and Humphreys suggests Starlink transmissions could be used to locate oneself to within a meter.

You can read the paper here [pdf].

It seems a no-brainer that at some point SpaceX management will recognize the money they can make from this extra capability, and will figure out the best way to produce and sell handheld units. It also appears that there will be profit in allowing others to also tag on.

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Virgin Orbit gets UK marine license for its Cornwall launch

9:26 am

Virgin Orbit has been issued its marine license from the United Kingdom for its planned October 29, 2022 launch from Cornwall, the first such orbital launch from the British Isles.

Virgin Orbit proposes to conduct a maximum of one launch in 2022 and approximately two launches per year over the next 8 years (January 2023-December 2030).

The licence issued by MMO covers the 2022 launch, the first of its kind in the UK. As there is material to be deposited into the sea that will be loaded in the UK, the activity requires a marine licence from MMO, as required by The Marine and Coastal Access Act 2009.

The ever-growing reach of government bureaucracy is worldwide. Though Virgin Orbit’s airplane, carrying the LauncherOne rocket and its seven smallsats, is taking off from Cornwall, the release of that rocket will not occur until it is over the Atlantic, with the expendable first stage falling into the ocean west of Portugal. Yet somehow the company must get permission of these UK bureaucrats — as well as American ones — to fly.

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A hole in space

8:48 am

A hole in space
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken by the Hubble Space Telescope and was released today as its picture of the week. From the caption:

This peculiar portrait from the NASA/ESA Hubble Space Telescope showcases NGC 1999, a reflection nebula in the constellation Orion. NGC 1999 is around 1350 light-years from Earth and lies near to the Orion Nebula, the closest region of massive star formation to Earth. NGC 1999 itself is a relic of recent star formation — it is composed of detritus left over from the formation of a newborn star.

Just like fog curling around a street lamp, reflection nebulae like NGC 1999 only shine because of the light from an embedded source. In the case of NGC 1999, this source is the aforementioned newborn star V380 Orionis which is visible at the centre of this image. The most notable aspect of NGC 1999’s appearance, however, is the conspicuous hole in its centre, which resembles an inky-black keyhole of cosmic proportions.

Once astronomers thought the black area was caused by dust, blocking the light. Now, based on a lot of new data from multiple ground- and space-based telescopes, they know that it actually is a black empty void. Why it exists however is not yet understood.

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Spanish high altitude tourist balloon company prepares for first test flight

9:07 pm

The Spanish high altitude tourist balloon company HALO is preparing to do the first test flight in December from India, with the second test flight planned for the first quarter of 2023 from Spain.

The Madrid-based company will take tourists to the edge of space in a capsule attached to a balloon – with prices from £87,000 to £174,000 (100,000 to 200,000 Euros).

The final capsule design will have capacity for 8 passengers and a pilot and feature panoramic windows which allow 360-degree views of the Earth at an altitude of up to 25 miles.

…The first commercial flights are expected to start in 2025 and the company plans to operate in four continents, making a total of 400 commercial trips with 3,000 passengers per year from 2029.

This market now appears to have three companies vying for customers, the American companies World View and Space Perspectives, and this Spanish company.

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OneWeb paid ISRO about $130 million for two GSLV launches

8:56 pm

It appears that OneWeb agreed to pay India’s space agency ISRO about $130 million for two GSLV launches, putting up 36 satellites on each launch.

When asked how much his business would spend to have 72 satellites launched, OneWeb Chairman Sunil Bharti Mittal told reporters in India that it would be more than Rs 1,000 crore.

Rs 1,000 crore translates to about $130 million, which means OneWeb paid about $65 million per launch, which is comparable to SpaceX’s standard Falcon 9 price, before discounts for using previously launched boosters.

It also appears that at present this deal is the only one between ISRO and OneWeb, and that the remaining 576 satellites that OneWeb needs to launch to complete its constellation are still open for others. At present, SpaceX and Relativity have contracts, though it is unclear how many each will launch. I suspect SpaceX will be the majority, since Relativity has not even completed its first test launch. It is also possible that ISRO will get more contracts based on its first launch success.

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Russia launches 4 satellites with Soyuz-2 rocket from Vostochny

8:06 am

Russia yesterday successfully launched four satellites from its Vostochny spaceport, using its Soyuz-2 rocket.

Three satellites were part of Russia’s data relay satellite constellation, and one was the first test satellite of Russia’s proposed low Earth orbit broadband constellation, comparable to Starlink.

The leaders in the 2022 launch race:

48 SpaceX
45 China
17 Russia
8 Rocket Lab
7 ULA

American private enterprise still leads China 68 to 45 in the national rankings, but trails the world combined 71 to 68.

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India’s GSLV-Mark3 rocket launches 36 OneWeb satellites

11:58 am

India’s GSLV-Mark3 rocket, its most powerful, has successfully placed 36 OneWeb satellites into orbit. As of this writing, the first 16 of the 36 satellites had successfully deployed.

This was the first international commercial launch for the GSLV rocket, previously used exclusively for Indian launches. It was also the first launch of OneWeb satellites since its deal with Russia was broken off due to the Ukraine war. Though the company had also quickly signed SpaceX to resume launches, I suspect that since half of OneWeb is owned by a major Indian investment company, India was given favored treatment in determining who would launch first.

This was the third successful launch in 2022 for India, the most since that country shut down in 2020 due to its panic over the Wuhan flu.

The leaders in the 2022 launch race remains unchanged:

48 SpaceX
45 China
16 Russia
8 Rocket Lab
7 ULA

American private enterprise still leads China 68 to 45, though it now trails the world combined 70 to 68.

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NASA buys 3 Orion capsules from Lockheed Martin for $2 billion

10:02 am

Nice work if you can get it! Earlier this week NASA awarded Lockheed Martin a new contract worth $1.99 billion to build three more Orion capsules for its Artemis program.

This order marks the second three missions under the agency’s Orion Production and Operations Contract (OPOC), an indefinite-delivery, indefinite-quantity (IDIQ) contract for up to 12 vehicles. A breakout of these orders includes:

  • 2019: NASA initiates OPOC IDIQ and orders three Orion spacecraft for Artemis missions III-V.
  • 2022: NASA orders three additional Orion spacecraft missions for Artemis VI-VIII for $1.99 billion.
  • In the future: NASA can order an additional six Orion missions.

Under OPOC, Lockheed Martin and NASA have reduced the costs on Orion by 50% per vehicle on Artemis III through Artemis V, compared to vehicles built during the design and development phase. The vehicles built for Artemis VI, VII and VIII will see an additional 30% cost reduction.

Lawdy me! They’ve reduced the price! Lockheed Martin is only charging NASA three-quarters of a billion dollars per capsule on this new contract (after NASA spent about $18 billion for the development of the first six capsules– that’s $3 billion each). And Lockheed Martin will only charge about a half billion per capsule for future capsules! My heart be still.

Meanwhile, SpaceX is designing, testing, building, and will likely launch its reusable Starship manned spacecraft, which could launch about 10 Orion capsules on each launch, for about $10 billion total. Once flying the expected cost per launch will likely be much less than $100 million, with SpaceX claiming it could be as low as $2 million. Even if you add the development cost for these launches, Starship will cost less than Orion by many magnitudes, on its first launch.

I wonder, which is the better bargain? NASA clearly can’t figure it out, and NASA has the smartest, most brilliant people in the universe working for it.

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ESA asks member nations to build lander for Franklin Mars rover

9:47 am

In its most recent request for funding from the member nations of the European Space Agency (ESA), the agency has asked the member nations to finance the design and construction of a new lander for its long delayed Rosalind Franklin Mars rover, replacing the Russian lander that had became unavailable due to sanctions resulting from Russia’s invasion of the Ukraine.

According to the BBC (opens in new tab), ESA will request 360 million euros to kickstart work on the new landing system, with additional funds likely needed in subsequent years. ESA has already spent some 1.3 billion euro on the ExoMars program, which also includes an orbiter that has been studying Mars’ atmosphere and surface since 2017. ESA will put the plan in front of delegates of its 22 member states at a ministerial conference in November.

“We will have to wait if the [member states] decide to go forward with the project,” Parker said. “This concept is now proposed as part of the director general’s package within [ESA’s] exploration program for decision at the ministerial [conference].”

If ESA’s member nations agree to this plan, expect the launch of Franklyn to be delayed further. Based on the normal pace in which ESA functions, that lander will take a minimum of five years to design and build (likely much longer). Though ESA is now targeting ’28 for the launch of Franklin, which was supposed to launch this past summer after a two year delay, this plan likely means it will not get off the ground this decade.

Meanwhile, there are now at least a half dozen private companies building lunar landers that could more quickly (and for less money) get a Franklin Mars lander built for ESA. None are in Europe however, which means ESA would rather have this mission delayed years so that it can funnel money to its own contractors..

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Russia’s Soyuz-2 rocket launches two military satellites

9:37 am

Russia today successfully launched from its Plesetsk spaceport two military satellites using its Soyuz-2 rocket.

Russian sources provided little information but it appears the launch was timed to allow these satellites to come close to an American military satellite.

Today’s launch of Kosmos-2561 and 2562 also seemed to mirror the trajectory of USA-326, with the American satellite passing over the cosmodrome roughly at the time of today’s launch.

If the latest launch is an inspector mission, it is possible that Kosmos-2562 is a subsatellite that was released by 2561 shortly after launch, as previous inspector satellites have done. Kosmos-2542 was believed to have been an inspector satellite, although never confirmed by Russia, and later released Kosmos-2543.

The launch was from the interior of Russia. The Soyuz-2 version launched was one with no side boosters, so that only the expendable core stage crashed in Russia.

The leaders in the 2022 launch race:

48 SpaceX
45 China
16 Russia
8 Rocket Lab
7 ULA

American private enterprise still leads China 68 to 45, though it now trails the world combined 69 to 68.

The launch of 36 OneWeb satellites by the biggest version of India’s GSLV rocket is right now counting down for a launch shortly. You can watch it here.

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Bedrock layers in Terby Crater on Mars

5:55 pm

Bedrock layers in Terby Crater on Mars
Click for full image.

Cool image to end the week! The picture to the right, rotated, cropped, reduced, and enhanced to post here, was taken by on July 18, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows the bedrock layers on one of two very large mesas that jut out into the floor of 108-mile-wide Terby Crater.

I want to focus your eye on the spoon-shaped mesa near the top right of the photo. Note how the layers can be seen on both sides, even though the top of the mesa seems to be concave. This is strange and complex geology, made even more fascinating in that the two mesas almost reach the center of the crater floor. Why are they here? Why were they not flattened during impact, like the rest of the crater floor? Or maybe the original crater floor is the mesa top, but if so, why did the rest of the crater interior get eroded away.

The overview map below provides some context, and helps fill in some details, even if it fails to answer any of these questions.
» Read more

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Ukraine officials in direct negotiations with Musk about Starlink

10:22 am

According to the Ukraine’s defense minister, they are now conducting direct negotiations with Elon Musk concerning the cost of using SpaceX’s Starlink constellation as part of its war against Russia.

In an interview, Defense Minister Oleksii Reznikov said “I know that we will not have a problem” keeping the service active, citing the “personal communication” between Ukraine’s Minister of Digital Transformation Mykhailo Fedorov and Musk.

Fedorov “is responsible for the digitalization and he has a direct connection with Elon Musk. They have a personal communication, and Mykhailo was really positive” about the situation in their last discussion of the issue, Reznikov said.

I suspect that at some point, the Ukraine will start paying SpaceX some money out of the $20 million per month Musk says it costs. And it will likely draw the cash for those payments from the approximately $50 billion the U.S. has sent it in aid.

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Astronomers discover an exoplanet with the density of a marshmallow

10:18 am

Using ground-based telescopes to gather more data about an exoplanet discovered by the orbiting TESS telescope, astronomers have found that it has the density of a marshmallow.

The planet orbits a red dwarf star, the most common star in the universe, and is the “fluffiest” yet seen around this type of star.

Red dwarf stars are the smallest and dimmest members of so-called main-sequence stars — stars that convert hydrogen into helium in their cores at a steady rate. Though “cool” compared to stars like our Sun, red dwarf stars can be extremely active and erupt with powerful flares capable of stripping a planet of its atmosphere, making this star system a seemingly inhospitable location to form such a gossamer planet.

Astronomers remain puzzled how such a large fluffy planet could have formed around such a dim small star.

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Rate of micrometeorite impacts on Webb holding as expected

10:10 am

According to this Space.com article, the rate and size of micrometeorite impacts on the main mirror of the Webb Space Telescope has held steady at the rate and size expected, since the first surprisingly large micrometeorite impact in May that slightly dinged one mirror segment.

At this point, JWST has experienced a total of 33 micrometeoroid events, according to Smith’s slides. But the most damaging one came before JWST began science observations; in late May, a particularly large micrometeoroid struck the observatory’s mirror, leaving its mark on one golden hexagon. The team estimates that a strike of that size should occur about once a year, Smith said.

“So we got that at month five,” he said. “We haven’t seen another one yet, so it’s still consistent with the statistics that we expected.”

Smith noted that, at the current impact rate, Webb will still be meeting its five-year performance requirement 10 years into the mission. Scientists estimate that the observatory has enough fuel to operate for 20 years.

Meanwhile, one of Webb’s infrared cameras is not doing spectroscopy as engineers analyze the high levels of friction in a “grating wheel.” At this point it appears they still do not understand the cause of the friction, and thus have not come up with a plan for mitigating it.

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Chandrayaan-3 now scheduled for summer 2023

10:01 am

India’s second attempt to put a rover on the surface of the Moon, Chandrayaan-3, has now been tentatively scheduled for launch in the summer of 2023.

The launch had originally been scheduled for launch in the fall of 2020, but was delayed when India shut down due to the Wuhan panic. Official at ISRO, India’s space agency, had hoped to launch by the summer of 2022, but that proved impossible. They have now delayed the mission a full year.

In fact, all earlier reports had indicated the rover was almost ready. This new delay of a full year suggests that some new issues might have been identified.

The news article at the link also notes that ISRO is now planning two unmanned orbital missions plus four launch abort tests before launching its first manned mission, dubbed Gaganyaan, not two abort tests as previously planned. They are still targeting ’24 for the manned mission.

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InSight status: Barely hanging on

9:50 am

InSight's power status as of October 19, 2022

The science team for the InSight lander on Mars today posted an update on the power the spacecraft’s dust covered solar panels are producing. I have added that data to my on-going graph of these power levels, to the right. From the update:

On October 19, 2022, InSight was generating an average between 275 and 285 watt-hours of energy per Martian day, or sol. The tau, or level of dust cover in the atmosphere, was estimated at 1.5 (typical tau levels outside of dust season range from 0.6-0.7).

The jump in tau level is due to a large dust storm that developed in September more than two thousand miles away in the southern hemisphere. Though it is so far away, that storm put a lot more dust in the atmosphere above InSight, and forced engineers to shut down all but its most essential functions.

That storm is apparently continuing, and might even be growing. If so, the future of InSight is dim indeed. Any further drop in the amount of power it generates daily will likely make it unable to operate at all, and the mission will end.

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Frozen lava flows around Martian hills

5:06 pm

Martian lava flowing around hills
Click for full image.

Cool image time! The photo to the right, rotated, cropped, reduced, and enhanced to post here, was taken on August 24, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows the westernmost edge of the Athabasca flood lava plain, thought to be the youngest lava flow on Mars, having covered the area of Great Britain in a matter of weeks 600 million years ago.

This image was a captioned feature yesterday by the MRO science team. As they note:

Although you can’t sail a boat on a sea of lava, hills and craters that stick up higher than the lava flow act like barriers. When a boat is driven through the water, there is a bow wave at the front of the boat, and a wake that trails off behind that indicates which way the boat is moving. In a lava flow, when a hill sticks up, the lava piles up on the upstream side (just like a bow wave) and can leave a wake on the downstream side, so we can tell which way the lava was moving against the stationary hill.

As you can see, every hill has a pile of lava on its northeast slopes, and a wake to its southeast. As the main vent of the Athabasca eruption is to the northeast, about 500 miles away (as shown on the overview map below), the flow direction suggested by the wakes fit the general geography.
» Read more

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Hubble spots double tail of debris from DART impact of Dimorphus

11:28 am

Dimorphus double tail
Click for original image.

A series of images taken by the Hubble Space Telescope of the ejecta released when DART crashed into the small 525-foot-wide asteroid Dimorphus has found that debris forming a double tail trailing away from the Sun.

The picture to the right, cropped, reduced, and enhanced to post here, was taken on October 11, 2022 by Hubble, and shows those two tails as close parallel debris trails.

Repeated observations from Hubble over the last several weeks have allowed scientists to present a more complete picture of how the system’s debris cloud has evolved over time. The observations show that the ejected material, or “ejecta,” has expanded and faded in brightness as time went on after impact, largely as expected. The twin tail is an unexpected development, although similar behavior is commonly seen in comets and active asteroids. The Hubble observations provide the best-quality image of the double-tail to date.

Following impact, Hubble made 18 observations of the system. Imagery indicates the second tail formed between 2-8 October 2022.

Though observations by telescope will continue for the years to follow, the real punchline to this event will be when the European probe Hera rendezvouses with the Didymous-Dimorphus pair in 2026 to perform several years of very close observations.

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NASA approves use of American spacesuits for spacewalks after investigation

10:14 am

NASA this week gave approval to the resumption of spacewalks on ISS, using its American spacesuits, following its investigation into a March incident where one astronaut’s spacesuit became somewhat water-logged.

The agency has now completed a review of the incident, finding that it was not a leak caused by hardware issues. Instead, the water was condensation caused by high levels of astronaut exertion and the cooling setting on Maurer’s extravehicular mobility unit (EMU) spacesuit, NASA officials said.

Though NASA was somewhat vague about the solution, it appears it has simply told astronauts to adjust the cooling setting of their suits to prevent condensation within the suits.

These American suits are very complicated to use, and very expensive. The agency has contracted out for new suits from private companies, but it will be very instructive to see what SpaceX comes up with for the spacewalk suits it is making for the private commercial manned Polaris Dawn mission in the spring of 2023.

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ESA delays first Ariane-6 launch to late in 2023

10:02 am

The European Space Agency has once again delayed the first Ariane-6 launch, shifting it to the fourth quarter of 2023.

Even so, officials warned that this is merely “a planned date,” and that static fire tests of both the first stage and second stage must first be completed before the launch can go forward.

Ariane-6 was initially supposed to begin launching in 2020, putting it three years behind schedule. Furthermore, it has struggled to obtain customers, as it is entirely expendable and thus expensive and not competitive with SpaceX’s Falcon 9.

Since Ariane-6 is delayed and the Ariane-5 rocket’s has only a few launches left before retirement, ESA officials also noted that it has now been forced to buy two launches from SpaceX.

The launches include the Euclid space telescope and the Hera probe, a follow-up mission to NASA’s DART spacecraft which last month succeeded in altering the path of a moonlet in the first test of a future planetary defence system. “The member states have decided that Euclid and Hera are proposed to be launched on Falcon 9,” ESA Director General Josef Aschbacher told reporters after a meeting of the 22-nation agency’s ministerial council.

The launches will take place in 2023 and 2024 respectively.

The irony is that ESA is probably going to save a lot of money launching with the Falcon 9, rather than its own Ariane-6. In fact, I would not be surprised if the total SpaceX price for both launches equals one Ariane-6 launch. Furthermore, SpaceX gets this business because its own American competitors, ULA and Blue Origin, have also failed to get their new rockets flying on time.

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SpaceX launches 54 Starlink satellites

9:37 am

SpaceX today successfully used its Falcon 9 rocket to launch 54 Starlink satellites.

The first stage completed its 10th flight, landing on its drone ship in the Atlantic.

The leaders in the 2022 launch race:

48 SpaceX
45 China
15 Russia
8 Rocket Lab
7 ULA

American private enterprise now leads China 68 to 45, and is tied with the entire world combined 68 each. Note that SpaceX’s 48 launches so far this year matches the entire total for the U.S. last year.

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A pseudo-oblique view of Jupiter’s cloud-tops

1:20 pm

A pseudo-oblique view of Jupiter's cloud-tops
Click for original image.

Cool image time! The image to the right, cropped, reduced, and annotated to post here, was created on October 18, 2022 by citizen scientist Thomas Thomopoulos from one of the photos taken by Juno during its close fly-by of Jupiter in May 2018.

He created this three dimensional relief by assigning different elevation values across the image’s greyscale, with white having the highest elevation. This relief is thus not based on actual topography, but it provides a nice way to illustrate the cloud structures of Jupiter’s cloud tops. It also, as Thomopoulos notes, provide a good way to possibly “see a representation in relief of surface movements.” Nor is his topography based on greyscale far wrong, since in many Jupiter images the lighter colored clouds are generally higher because the darker ones are in shadow.

The map below provides the context and scale of this image.
» Read more

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Twelve years of data from WISE

10:43 am

The Wide Field Infrared Survey Explorer (WISE) was launched in 2009 with an intended mission of two years, during which it would map the sky looking for asteroids. In 2011 NASA extended the mission, renaming the telescope for inexplicable reasons to NEOWISE (adding “Near-Earth Object” to the beginning).

In the more than a decade since, the telescope has been able to get eighteen repeated scans of the entire sky, allowing scientists to track many changes in a variety of stellar objects over time.

Yesterday NASA issued a press release celebrating this long achievement.

Every six months, NASA’s Near-Earth Object Wide Field Infrared Survey Explorer, or NEOWISE, spacecraft completes one trip halfway around the Sun, taking images in all directions. Stitched together, those images form an “all-sky” map showing the location and brightness of hundreds of millions of objects. Using 18 all-sky maps produced by the spacecraft (with the 19th and 20th to be released in March 2023), scientists have created what is essentially a time-lapse movie of the sky, revealing changes that span a decade.

There is a bit of hype in this claim. The data isn’t really useful when looked at across the entire sky. One has to zoom into particular objects to see them evolve over time. Also, many of these changes, such as with variable stars, are well known and tracked by many other telescopes.

Nonetheless, this infrared database is very valuable. It can be used for example by astronomers to identify objects that should be viewed with high resolution in the infrared, by Webb.

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Webb takes infrared image of Hubble’s Pillars of Creation

10:28 am

The Pillars of Creation, as seen by Hubble and Webb
Click for original image.

Not unexpectedly, astronomers have quickly begun aiming the Webb Space Telescope’s infrared eye at some of the most famous targets previously imaged in optical wavelengths by the Hubble Space Telescope.

The newest example is shown to the right and reduced and labeled to post here. It shows what NASA officials dubbed “The Pillars of Creation” when Hubble first photographed this nebula in 1995, with a later 2014 Hubble optical image at the top and the new 2022 Webb infrared image on the bottom. From this image’s caption:

A new, near-infrared-light view from NASA’s James Webb Space Telescope, at [bottom], helps us peer through more of the dust in this star-forming region. The thick, dusty brown pillars are no longer as opaque and many more red stars that are still forming come into view.

While the pillars of gas and dust seem darker and less penetrable in Hubble’s view [top], they appear more diaphanous in Webb’s. The background of this Hubble image is like a sunrise, beginning in yellows at the bottom, before transitioning to light green and deeper blues at the top. These colors highlight the thickness of the dust all around the pillars, which obscures many more stars in the overall region.

In contrast, the background light in Webb’s image appears in blue hues, which highlights the hydrogen atoms, and reveals an abundance of stars spread across the scene. By penetrating the dusty pillars, Webb also allows us to identify stars that have recently – or are about to – burst free. Near-infrared light can penetrate thick dust clouds, allowing us to learn so much more about this incredible scene.

While the Hubble colors attempt to mimic the colors seen by the human eye, the colors in the Webb image are all false colors, chosen by the scientists to distinguish the different infrared wavelengths produced by different features in the picture.

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SpaceX simplifies smallsat rideshare program, effectively slashing prices

10:11 am

SpaceX has reworked its smallsat rideshare program to allow smaller satellite customers to book directly with the company, effectively slashing the prices they are charged.

While it technically hasn’t reduced its prices, SpaceX will now allow satellites as small as 50 kilograms to book directly through the company at its virtually unbeatable rate of $5500 per kilogram. Before this change, customers with small satellites would either have to pay for all the extra capacity they weren’t using, boosting their relative cost per kilogram, or arrange their launch services with a third-party aggregator like Spaceflight or Exolaunch.

Part of the reason for this change is the shift by SpaceX to a new satellite deployment platform that allows for a wider variety of satellites of all sizes. Some tiny satellites will no longer have to rely on an aggregator’s own deployment platform.

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Isaacman’s next private mission to space now scheduled for March ’23

9:53 am

Jared Isaacman’s next private mission on a Dragon capsule, dubbed Polaris Dawn, has now been scheduled for March ’23, during which the first spacewalk by a private citizen will occur.

The mission is planned to last five days, will have a crew of four led by Isaacman, and will also attempt the highest Earth orbit flown by any manned mission. From the mission’s webpage:

At approximately 700 kilometers above the Earth (434 miles), the crew will attempt the first-ever commercial extravehicular activity (EVA) with SpaceX-designed extravehicular activity (EVA) spacesuits, upgraded from the current intravehicular (IVA) suit.

It is not clear if one or all four of the crew members will participate in that spacewalk. At a minimum, all four must be in suits that can work during a spacewalk, since their Dragon capsule does not have an airlock.

The mission will also be used as to raise funds for St. Jude Children’s Hospital, as was done during Isaacman’s first flight, Inspiration4, in the fall of 2021.

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JAXA reveals cause of Epsilon rocket failure

9:41 am

Japan’s space agency JAXA yesterday announced the results of its investigation into the launch failure of its Epsilon rocket on October 12, 2022, pinpointing the cause to the attitude control system in the solid-fueled second stage.

After the launch of the three-stage solid-propellant rocket, the first-stage rocket engine worked normally and was detached as scheduled. The second-stage engine showed no combustion problem, but an abnormal attitude was confirmed immediately after the engine used up its fuel, JAXA told a science ministry meeting.

The attitude was off to the lower right by some 21 degrees more than planned, according to JAXA. The space agency judged that the rocket could not enter Earth orbit and sent a self-destruction signal to the rocket 6 minutes and 28 seconds after liftoff.

Analyses of flight and other data showed that one function of a reaction control system, which uses thrusters to control attitude and other factors, did not work after the combustion of the second-stage engine, according to JAXA.

Epsilon is Japan’s attempt to produce a low cost rocket, though it has only launched a handful of times since its first launch in 2013, suggesting it has not been attracting many customers.

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