Month: August 2023

Satellite startup Planet lays off 10% of its workforce, most located in San Francisco

9:00 am

According to a filing to the SEC yesterday, the smallsat startup Planet has laid off 10% of its workforce, 117 employees of which 85 are located in San Francisco, in order “to prioritize our attention on the highest ROI [return on investment] opportunities for our business and mission,” as expressed by the company’s CEO to his employees.

The company presently operates a constellation of more than 200 small satellites designed to provide high resolution imagery of the Earth. In late 2021 it went public through a merger with a SPAC (special purpose acquisition company), and has since seen its stock price drop from $11.35 to $3.75 yesterday.

The layoffs this week are likely simply the company recognizing that its main office in San Francisco had become bloated and it needed to economize. It is even possible the company is now considering a move from San Fran and California, though this is not mentioned in any of its announcements.

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Bones of the biggest ever whale species possibly found?

8:49 am

A big whale?

The uncertainty of science: Paleontologists have discovered a portion of the skeleton of what they claim might be the biggest and heaviest animal ever found, a whale that potentially grew to be as much as twice as big as a blue whale, the largest living species previously known.

A newly described fossilized whale named Perucetus colossus, dating to roughly 38 million years ago, might have been heavier than a blue whale, even if it was not as long. Blue whales, which are endangered, weigh about 100 to 150 tonnes, although some might be as heavy as 200 tonnes. Perucetus colossus was between 85 and 340 tonnes, according to the scientists who found and described the remains: 13 vertebrae, 4 ribs and a bit of pelvis. Their best-guess estimate is that the whale was around 180 tonnes. This mind-boggling mass is the result of its bones, which were big and dense — an evolutionary adaptation that helped it to dive.

The graphic to the right shows the discovered bones in red, with the rest of the theorized skeleton indicated in grey. Only in the article’s next-to-last paragraph does Nature recognize this very very very large uncertainty:

The team chose to create a visual reconstruction of what the whale might have looked like, basing the head on skulls of related basilosaurid species, but they caution that some of the details are speculative. It could have been skinnier. But it also could have been quite a bit longer or fatter, [co-author Eli] Amson says.

In other words, they presently have no idea what the species actually looked like, or how big it actually was. It very well could have been much shorter and thinner than proposed. It appears therefore they chose to highlight the largest possible size to garner the biggest press coverage — which of course they are getting.

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NASA detects weak signal from Voyager 2

8:22 am

Though communications with Voyager 2 have not been re-established, JPL engineers using NASA’s Deep Space Network of antennas have detected a weak signal from Voyager 2 that indicates the spacecraft is still functioning.

Using multiple antennas, NASA’s Deep Space Network (DSN) was able to detect a carrier signal from Voyager 2. A carrier signal is what the spacecraft uses to send data back to Earth. The signal is too faint for data to be extracted, but the detection confirms that the spacecraft is still operating. The spacecraft also continues on its expected trajectory. Although the mission expects the spacecraft to point its antenna at Earth in mid-October, the team will attempt to command Voyager sooner, while its antenna is still pointed away from Earth. To do this, a DSN antenna will be used to “shout” the command to Voyager to turn its antenna. This intermediary attempt may not work, in which case the team will wait for the spacecraft to automatically reset its orientation in October.

The hope is that new commands to re-orient, sent by the strongest signal possible, might be heard by the spacecraft, causing it to obey now. If not, this weak signal from Voyager 2 still suggests that the October reset will occur as normal and engineers will be able to recover communications then.

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Northrop Grumman’s Antares rocket successfully places Cygnus freighter into orbit

5:44 pm

Northrop Grumman’s Antares rocket tonight successfully launched a Cygnus freighter into orbit to ISS, flying for the last time with a first stage built in the Ukraine with engines from Russia.

Until Firefly can provide Northrop Grumman with a new American-made first stage, for the next three Cygnus cargo missions to ISS the company has purchased SpaceX’s Falcon 9 rocket.

This was Northrop Grumman’s first launch in 2023, so there is no change to the leader board in the 2023 launch race:

51 SpaceX
30 China
9 Russia
6 Rocket Lab
6 India

American private enterprise now leads China in successful launches 59 to 30, and the entire world combined 59 to 50, with SpaceX by itself still leading the entire world (excluding American companies) 51 to 50.

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Sunspot update: In July the Sun continued its high sunspot activity

5:05 pm

Today NOAA released its monthly update of its graph that tracks the number of sunspots on the Sun’s Earth-facing hemisphere. As I have done every month for the entire thirteen years I have been doing this website, I have posted that updated graph below, adding to it some extra details to provide some context.

Though the sunspot count in July was slightly less than the very high numbers in June (the highest seen in more than two decades), the decline was almost inconsequential. Except for June’s activity, the activity in July was still the highest sunspot count in a month since September 2002, when the Sun was just beginning its ramp down after its solar maximum that reached its peak in late 2001. From that time until the last two months, the Sun had been in a very prolonged quiet period, with two solar minimums that were overly long and a single solar maximum that was very weak with a extended double peak lasting almost four years.
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August 1, 2023 Quick space links

3:41 pm

Courtesy of BtB’s stinger Jay.

 

 

For the next three Cygnus cargo missions to ISS Northrop Grumman has hired SpaceX’s Falcon 9 rocket as its launch vehicle while it awaits a new first stage from Firefly.
 

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The wind-scoured dusty and cratered dry tropics of Mars

1:16 pm

The wind-scoured dusty and cratered dry tropics of Mars
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on June 2, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO), and shows one small area in Martian equatorial regions where the main features are a dusty plain interspersed with craters, not entirely dissimilar to the Moon .

In the picture the northwest-to-southeast orientation of ridge-lines, plus the position of divots with their steep and deep end all on the northwest side, all suggest the prevailing winds here blow in the same direction, from the northwest to the southeast.

We are looking at a very ancient terrain. Many of these craters likely date from the early bombardment period of the solar system, just after the planets had formed but there was still a lot of objects around crashing into them.
» Read more

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Teachers, parents, and even school districts sue PA Ed Dept over Marxist guidelines

12:34 pm

Parents are rejecting this in droves
Now parents, teachers, and administrators are rejecting this mantra

In April a lawsuit against the Pennsylvania Department of Education was filed by the parents, teachers,and three different school districts in western Pennsylvania, challenging the guidelines issued by the state that would force leftist indoctrination down the throats of kids and teachers.

The Mars Area, Penn Crest, and Laurel school districts, as well as two teachers, several board members and parents, filed a lawsuit Monday trying to stop the Shapiro [Democrat] administration from implementing “culturally relevant and sustaining education,” also known as CRSE, in every school district in Pennsylvania.

Leonard Rich, the superintendent of the Laurel School District, explained to KDKA-TV why he and the district joined the lawsuit. “CSRE goes beyond and tells students what to think,” he said. “I’m more driven to tell students and encourage students on how to think.”

“The district’s objection that we are being mandated to not teach our kids how to think but what to think,” he added. “Freedom of expression is a First Amendment right.”

The Thomas More Society is representing the litigants. You can read the filed complaint here [pdf].

The new guidelines are right out of the critical race theory playbook, requiring schools and teachers to:
» Read more

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Eruption on comet results in its tail splitting as it brightens by 100x

9:28 am

On July 20, 2023 the Comet 12P/Pons-Brooks suddenly erupted for the first time in almost seven decades, making it a hundred times brighter than normal while splitting its tail in two.

As of July 26, the comet’s coma had grown to around 143,000 miles (230,000 kilometers) across, or more than 7,000 times wider than its nucleus, which has an estimated diameter of around 18.6 miles (30 km), Richard Miles, an astronomer with the British Astronomical Association who studies cryovolcanic comets, told Live Science in an email.

But interestingly, an irregularity in the shape of the expanded coma makes the comet look as though it has sprouted horns. Other experts have also likened the deformed comet to the Millennium Falcon, one of the iconic spaceships from Star Wars, Spaceweather.com reported.

It is believed the tail’s shape is the result of the shape of the comet’s nucleus, which probably had a solid ridge acting as a barrier to material at that point.

The comet, which orbits the Sun every 71 years, will make its closest approach to Earth in the spring of 2024, when it will likely be visible to the naked eye.

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Chandrayaan-3 is now on its way to the Moon

9:11 am

Chandrayaan-3's mission profile

According to a tweet from India’s space agency, ISRO, engineers have successfully completed the trans-lunar-injection burn that has now sent its Chandrayaan-3 lunar lander/rover on its way to the Moon.

As shown in mission’s profile graphic to the right, the spacecraft spent the last two weeks in Earth orbit. repeatedly raising its orbit to reduce the amount of fuel necessary to send it to the Moon. It will now take about five days traveling to the Moon, entering its orbit on August 5th. It will then spend about two weeks lowering that orbit slowly, until it is in the proper orbit for the descent to the surface on August 23, 2023.

If all goes well, its Vikram lander will gently place the Pragyan rover in the high southern latitudes, where it will function for about two weeks, or during the daylight portion of one lunar day.

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Biden reverses late Trump decision to move Space Force headquarters

9:00 am

President Biden yesterday reversed a late Trump decision to move Space Force headquarters from Colorado to Alabama, allowing it to remain in Colorado where most of the former Air Force space operations have been.

Peterson Space Force Base in Colorado Springs has been the preferred choice of the top military space brass ever since the basing process began way back in 2018. Trump’s decision was made over their concerns that moving SPACECOM from its current home (previously the home of Air Force Space Command) would needless delay its full operational capability.

Biden, in the end, shared those concerns. “The most significant factor the President considered was the impact a move would have to operational readiness to confront space-enabled threats during a critical time in this dynamic security environment. U.S Space Command headquarters will achieve ‘full operational capability’ at Colorado Springs later this month. Maintaining the headquarters there maintains operational readiness and ensures no disruption to its mission or to its personnel,” a senior administration official told Breaking Defense in an email. “A move to Alabama, by contrast, would have forced upon that command a transition process between the mid-2020’s and the opening of the new site in the early to mid-2030’s.

Of course, politics was involved as well, with Colorado lawmakers putting great pressure on Biden to make this decision. Alabama lawmakers now say they will fight the decision, but because of the relative speed in which new headquarters can be established, their task is difficult if not impossible.

That difficulty will be reinforced by the proposal of the Senate Appropriations Committee decision to cut the Space Force’s ’24 budget by $1 billion, a 3% reduction. That proposal also has support in the House, which suggests it will become law. Though the cuts are scattered throughout the agency, it will lack the cash necessary to make the expensive shift to Alabama, a fact that will hinder any arguments for making that shift.

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