Author: Robert Zimmerman

Neptune’s cooling when it should be warming

9:45 am

Neptune since 2006

The uncertainty of science: Observations of Neptune during the past seventeen years using the Very Large Telescope have shown the planet mostly cooling during this time period, even though Neptune was moving into its summer season.

Astronomers looked at nearly 100 thermal-infrared images of Neptune, captured over a 17-year period, to piece together overall trends in the planet’s temperature in greater detail than ever before. These data showed that, despite the onset of southern summer, most of the planet had gradually cooled over the last two decades. The globally averaged temperature of Neptune dropped by 8 °C between 2003 and 2018.

The astronomers were then surprised to discover a dramatic warming of Neptune’s south pole during the last two years of their observations, when temperatures rapidly rose 11 °C between 2018 and 2020. Although Neptune’s warm polar vortex has been known for many years, such rapid polar warming has never been previously observed on the planet. “Our data cover less than half of a Neptune season, so no one was expecting to see large and rapid changes,” says co-author Glenn Orton, senior research scientist at Caltech’s Jet Propulsion Laboratory (JPL) in the US.

The sequence of photos above show that change over time. Lower latitudes generally get darker, or cooler, while the south pole suddenly brightens, getting hotter, in 2020.

The scientists have no idea why this has happened, though they have theories, ranging from simple random weather patterns to the influence of the Sun’s sunspot cycle.

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Rocket Lab breaks ground on Neutron rocket factory

9:22 am

Capitalism in space: Rocket Lab yesterday broke ground on the construction of its larger proposed Neutron rocket factory at Wallops Island, Virginia, right next door to where the company plans to launch it.

The 250,000 square foot Neutron Production Complex is being constructed on a 28-acre site adjacent to the NASA Wallops Flight Facility and Mid-Atlantic Regional Spaceport on Virginia’s Eastern Shore. The complex will support Neutron production, assembly, and integration, and is expected to bring up to 250 highly-skilled roles to the region. Construction will also soon begin on a launch pad for Neutron at the southern end of Wallops Island, near Rocket Lab’s existing launch pad for the Electron rocket.

Neutron will largely reusable, its first stage returning to Earth for reuse, and carrying with it the skin of the second stage. The design combines this skin with the fairings that protect the payload and second stage engine, so that only the second stage engine is lost in orbit.

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ISRO hires company to build future PSLV rockets

9:13 am

Capitalism in space: For the first time, India’s space agency ISRO is about to hire a private company to build five PSLV rockets, rather than supervise the construction in-house.

Hindustan Aeronautics Limited (HAL) and L&T consortium has emerged as the lowest bidder to make 5 Polar Space Launch Vehicles (PSLVs) for ISRO. “The company is the lead partner with L&T sharing the work. Other vendors too will be involved with the consortium in the manufacturing of the launch vehicles (LVs). However, the contract is yet to be formalised/ awarded,” HAL said in a statement.

If all goes as planned, the first rockets will be delivered late in ’24.

This contract changes less than it seems, though it is a step in the right direction. ISRO has for years hired private subcontractors to build its rockets and components. What is different now is that it appears that HAL is now the lead contractor, not ISRO. HAL however does not appear to own the rockets it builds, and thus will not be able to build more to sell launches to others. Until this happens, India’s space industry will remain wholly government run.

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Today’s blacklisted American: News staffers at CBS demand network blacklist Republican

1:12 pm

CBS NEWS: Home of blacklisting

The new dark age of silencing: When the news division at CBS recently decided to hire Mick Mulvaney, a former Republican congressman and a former chief of staff for President Trump, there was a outraged revolt among the network’s news staff, demanding that the hiring be cancelled and that CBS blacklist all such partisan Republicans.

[Jeremy Barr, liberal Washington Post media reporter,] “obtained” a recording of a staff meeting led by CBS News co-president Neeraj Khemlani. Surely, the staffer recording this meeting was outraged that Khemlani said “getting access to both sides of the aisle is a priority because we know the Republicans are going to take over, most likely, in the midterms.”

Anonymous CBS News Democrats were alarmed “the network was jeopardizing its long history of journalistic excellence.” And you thought Dan Rather already did that.

“I know everyone I talked to today was embarrassed about the hiring,” said a CBS News employee who “spoke on the condition of anonymity because they were not authorized to comment.” This is the most ridiculous use of anonymous sourcing – to protect liberals while they publicly campaign against their bosses.

» Read more

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Perseverance arrives at Three Forks at the base of Jezero Crater’s delta

12:01 pm

Panorama of delta in Jezero Crater
Original images found here, here, here, and here. Click for full resolution.

Overview map
Click for interactive map.

Cool image time! The panorama above was created from four navigation camera images taken by the Mars rover Perseverance on April 10th. Because the lens on Perseverance’s navigation cameras produce slightly curved images which are taken in pairs, the panorama is made of two parts, each a pair perfectly matched images looking from a different angle. I have overlapped the pairs but as you can see, the match at the center is imperfect. While this does not produce a single smooth image, the two paired panoramas show the foot of the entire delta that had flowed into Jezero crater in the past and is the prime geological target of the rover. What is it made of? What caused it to flow into the crater? When did it do it? How was Mars different when it did so? Was the crater wet? Was the delta mud when it flowed, or was it sediment under water, pushed out by that flowing water?

The location map to the right is taken from the “Where is Perseverance?” webpage but annotated to show the planned routes of both Perseverance and Ingenuity, as shown by the tan dashed lines. The red dot marks Perseverance present location, the green dot Ingenuty’s. The yellow lines the approximate area covered by the panorama.

What next? Expect Perseverance to move as close to the base of the delta’s cliff as possible and spend at least several months studying it. Ingenuity meanwhile will be flown to the west to scout the various hollows that are potential routes for Perseverance to climb up onto the delta.

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Astroscale demo to test space junk removal struggles with failed thrusters

9:35 am

Capitalism in space: Astroscale demo mission, ELSA-d, has been unable to complete a docking with its target vehicle as planned because four of the eight thrusters on the capture “servicer” vehicle have failed.

Engineers had separated the servicer from the target in January so that it could perform a rendezvous and then docking, from a distance, but that test was halted when engineers detected what the company only labeled as “anomalous spacecraft conditions.” This new announcement reveals what that problem was.

With safety always paramount, the Astroscale team has used a complex mix of burns with the remaining thrusters, aerodynamic drag and the natural perturbations of Earth’s gravity to bring the servicer safely back to a distance where operations can continue.

This revised plan began on February 18th, and has now apparently been mostly completed. However, rather than dock, the company has decided to only approach as close to 160 meters (525 feet) to test some sensors, and then retreat. Whether they will then attempt a recapture remains undecided.

Astroscale’s goal is to convince satellite companies to install its magnetic capture device on their satellites. Astroscale’s servicer could then use it to dock with a defunct satellite and deorbit it or maybe fix it. This demo flight was to prove the rendezvous and capture device worked.

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NASA will not load fuels in SLS upper stage in next dress rehearsal countdown attempt

12:29 am

In the next attempt to complete the first “wet dress rehearsal” of NASA’s SLS rocket tomorrow, April 11th, the dress rehearsal will not be as wet as originally planned.

NASA said April 7 that engineers found a problem maintain helium purge pressure in the ICPS [SLS’s upper stage] after changing out a regulator in the mobile launch platform. At that time, the agency said it was able to restore normal pressure but was still studying the source of the problem, now linked to the faulty valve in the ICPS itself.

Because that issue, NASA now plans to limit the amount of liquid oxygen and liquid hydrogen propellant loaded into the ICPS during the WDR. NASA said the countdown rehearsal will be modified with “minimal propellant operations” on the ICPS, but didn’t elaborate on how much propellant would be transferred into the upper stage.

As usual, NASA officials are now making believe that they will achieve all their goals for the dress rehearsal if they complete it without completely fueling the upper stage. This is intellectually dishonest. This dress rehearsal was intended to test all aspects of the rocket’s launch countdown, including the fueling of all its stages. If they complete it without successfully fueling the upper stage, they will not achieve all their goals. Period.

The plan right now is to attempt this revised launch rehearsal tomorrow, then return the rocket to the vehicle assembly building where engineers will replace the faulty valve. At that point it is unclear what the agency will do next.

Though this incomplete test will have taught them a lot, if they do not redo the dress rehearsal with full loading of all stages but instead proceed to a launch attempt in the present target window from June 6 to June 16, they will be doing so with a greater risk. Of course, if the new valve works during that launch attempt, then all should be well. In fact, this risk appears quite reasonable.

Nonetheless, the fundamental problem remains: NASA is under pressure to launch, and held off this kind of testing until very late in the program. Finding these problems now puts serious limits on the ability of the agency to fix them. This in turn puts serious limits on the reliability of SLS.

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Splonk went the crater!

12:59 pm

Splonk went the crater!
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken on February 18, 2022 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what the scientists label as a “degraded crater in Utopia Planitia.”

There is a lot of intriguing geology in this one image. First of course is the crater itself. We have to ask, is it from an impact or from some volcanic process? The location, at 44 degrees north latitude, argues that some form of ice or mud process was involved. Maybe we are looking at a frozen eruption from an underground ice layer. If this was instead caused by an impact, the crater’s ringlike structure could have been created by the ripples of melted ice and mud emanating away but then quickly refreezing.

Surrounding the crater are many small fissures, the largest ones all oriented in a north-south direction. If there is an ice layer near the surface, these cracks might be caused by that ice sublimating away. Why the largest cracks orient in the same direction however is a mystery.

The color variations suggest [pdf] dust (red-orange) as well as a variety of minerals (green). Since no blue appears visible in this version of the photo, if this crater was shaped by melting or erupting ice, that ice is well covered by that layer of dust and debris.

The location map below as always provides context.
» Read more

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Pushback: NJ gym-owners who refused to obey COVID edicts regain business license

11:30 am

Bill of Rights, canceled in New Jersey these past two years
The Bill of Rights, canceled in New Jersey
these past two years.

A profile in courage: The owners of a New Jersey gym, Atilis Gym, who refused to comply with any of the absurd Wuhan flu restrictions imposed by Democratic Party Governor Phil Murphy and his health department have had their business license restored after two years, during which they managed to keep the gym functioning by asking for donations by those who used it.

[Ian] Smith claimed that as a result of not complying with lockdown orders, he and [Frank] Trumbetti received more than 90 citations, along with ten gym members who received citations; 9 criminal charges; that both he and Trumbetti were arrested, as well as one member; that local police changed the locks on the building, backed up their plumbing, and eventually boarded up the gym; that they were fined $15,497.76 every day they remained open, for 5 months; that $173,000 in fundraising for their legal defense was seized by the state; and that they owe more than $300,000 in legal bills. “And they took our business license,” Smith wrote. “Our ability to pursue the American dream. All for what? We were right all along. To date, 391,683 visits to our facility and people got healthier, happier, and better.”

“Well, it paid off,” Smith continued. “The township folded. They reinstated our business license. It took them 2 years to realize that nothing would make us kneel. … We made it. 2 years without charging a single member – just donations and [T-Shirt] sales. All the legal bills, fines, normal overhead, and safety equipment. We were able to do it because of you all. Thank you all again.”

Expect these owners to follow up with lawsuits to recover damages for the state’s illegal acts to try to destroy them.

Their resistance to tyranny was very painful for these brave men, but their courage cannot be applauded enough. They did what more Americans should have done, and did not. They stood up to the idiotic health orders of the state, that were based on no science at all and were completely useless:
» Read more

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