Category: Points of Information

Very brief descriptions, with appropriate links, of current or recent news items.

Endeavour Dragon capsule carrying four astronauts safely splashes down

8:53 am

SpaceX’s Endeavour Dragon capsule safely splashed down shorty after midnight last night in the Atlantic off the coast of Florida, completing a six month mission for two Americans, one Russian, and one astronaut from the United Arab Emirates (UAE).

The UAE astronaut, Sultan Al Neyadi, flew as a paying passenger, obtaining his flight through the private space station company Axiom, which in turn purchased the ferrying services to and from ISS from SpaceX. The Russian flew as part of the barter deal that NASA presently has with Russia, with each flying astronauts on the other nation’s capsules at no cost in order to make sure everyone knows how to use them in case of emergency.

Several additional details: First, in the post-splashdown press conference SpaceX officials revealed they are presently building a fifth manned Dragon capsule to add to its fleet, and are also aiming to fly each as much as fifteen times. This suggests they are anticipating a lot of business hauling both NASA and commercial passengers into space.

Meanwhile, the Russian-launched crew on ISS that launched last September and includes American Frank Rubio is targeting a return-to-Earth on September 27, 2023. If so, they will have completed a 371 day flight, or almost thirteen months. This I think is the second longest human flight so far in space, exceeded only by Valeri Polykov’s fourteen-and-half month mission in the 1990s.

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Engineers had Vikram do short flight hop prior to shutting down

8:36 am

Indian engineers revealed today that prior to putting the Vikram lander to sleep for the long lunar night, they had the lander use its rocket engines to do a short up and down flight. From the first link:

“On command it (Vikram lander) fired the engines, elevated itself by about 40 cm as expected and landed safely at a distance of 30 to 40 cm away,” ISRO said in an update on ‘X’.

Before doing the hop engineers stored Vikram’s instruments and rover ramp, then redeployed them afterward to gather a tiny bit of new data before putting everything into hibernation.

The hop test proved that Vikram’s engines could be restarted even after being on the Moon for almost two weeks, and thus could potentially be used on a future sample return mission. It also suggested a future mission could choose to change its landing site periodically by use of its landing engines.

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SpaceX launches 21 Starlink satellites

8:11 pm

Using its Falcon 9 rocket, SpaceX tonight successfully launched another 21 Starlink satellites, lifting off from Cape Canaveral.

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

This was SpaceX’s 62nd launch in 2023, a new annual record for the company, as well as any private company anywhere ever. It was also the 71st American launch in 2023, which beats the launch record of 1966 which had lasted until only last year.

It appears SpaceX is moving its live stream off of Youtube and onto X. At least, this live stream was only on X. If so, that is a shame as it lowers its visibility. It is also understandable. Why should SpaceX send business to X’s competitor?

The leaders in the 2023 launch race:

62 SpaceX
38 China
12 Russia
7 Rocket Lab
7 India

In the national rankings, American private enterprise now leads China in successful launches 71 to 38. It also leads the entire world combined, 71 to 62, while SpaceX by itself now tied the rest of the world (excluding American companies) 62 to 62.

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Engineers place Pragyan into sleep mode

9:26 am

With lunar sunset looming, engineers have completed all work on both the lander Vikram and the rover Pragyan and have prepared Pragyan as best as possible to survive the long 14-Earth-day long lunar night.

Currently, the battery is fully charged. The solar panel is oriented to receive the light at the next sunrise expected on September 22, 2023. The receiver is kept on.

All data from Vikram’s instruments has been transmitted back to Earth, through the rover. It appears that the mission has been using the rover has the main communications relay, not the lander. It also appears there is no expectation of the lander surviving the lunar night.

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ESA successfully test fires upper stage engines of new Ariane-6 rocket

12:02 pm

Despite delays in test firing the first stage engines on ESA’s new Ariane-6 rocket, it has successfully tested fired the rocket’s upper stage engines in Germany.

The test of the full upper stage – including the new Vinci engine and a smaller Auxiliary Power Unit (APU) – took place on a purpose-built test bench at German Aerospace Center DLR’s engine test centre in Lampoldshausen, Germany.

Vinci, the upper stage engine of Ariane 6 fed by liquid hydrogen and oxygen, can be stopped and restarted multiple times – to place satellites into different orbits and then de-orbit the upper stage, so it is not left behind as hazardous debris in space. The APU makes it possible for Vinci to restart in space, by maintaining adequate pressure in the fuel tanks and preventing bubbles in the fuel lines. The APU uses small amounts of liquid hydrogen and oxygen from the main tanks – replacing a system which relied on large quantities of tanked helium.

A last hot-fire test is scheduled before final qualification of the Ariane 6 upper stage, with the aim of testing its operation for different types of missions, as well as in degraded conditions.

Meanwhile, the next attempt to do the same with the first stage in French Guiana is scheduled to take place on September 5th.

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Pragyan rover moves more than 300 feet away from Vikram

11:01 am

Map of Pragyan's traverse
Click for original image.

India’s space agency ISRO today released a map, shown to the right, that shows the entire traverse so far completed by its Pragyan rover in the Moon’s high southern latitudes. It has so far traveled more than 100 meters, or 300 feet, and continues to operate as planned.

The part of the traverse just south of the Vikram lander is where the lander filmed the rover doing several quick maneuvers and a 360 degree spin as engineers tested its operation before heading out on a longer journey. The rover’s image of the crater that the rover avoided, though released first, was actually taken afterward, after the rover had moved to the west.

Lunar sunset is in two days. Though engineers are preparing both Vikram and Pragyan for hibernation during that long lunar night, neither was designed to survive that extreme environment.

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SpaceX launches 13 satellites for the Space Force

10:32 am

SpaceX early this morning successfully completed its second launch for the Space Force, lifting off from Vandenberg Space Force Base in California and placing another thirteen satellites of its Tranche-0 constellation into orbit.

The first stage completed its thirteenth mission, successfully landing back at Vandenberg.

This flight was SpaceX’s 61st in 2023, which matches the record it set last year, doing it in only eight months. With four months still left to go in the year the chances of SpaceX meeting its goal of 100 launches in the year still remains a possibility.

Furthermore, this was the 70th successful launch for the United States this year, which matches the record that the nation had set in 1966, and had been the record for the country until last year, when American companies (with help of one government launch) completed 85 launches. It seems last year’s record will be smashed without much problem.

The leaders in the 2023 launch race:

61 SpaceX
38 China
12 Russia
7 Rocket Lab
7 India

In the national rankings, American private enterprise now leads China in successful launches 70 to 38. It also leads the entire world combined, 70 to 62, while SpaceX by itself now trails the rest of the world (excluding American companies) by only 61 to 62, with another Starlink launch is now scheduled for tomorrow.

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India successfully launches its first solar observation satellite

11:44 pm

India’s space agency ISRO tonight (September 2, 2023 in India) successfully used its PSLV rocket with six strap-on boosters to place in orbit its first solar observation satellite, Aditya-L1, lifting off from its coastal Sriharikota spaceport.

The spacecraft will eventually maneuver itself to the L1 point about one million miles closer to the Sun, where it will make continuous observations of the star’s visible hemisphere, using seven different instruments. Its observations will supplement those of the SOHO solar observatory (also located at the L1 point), which was launched in 1995 and is long overdue for replacement, or at least some redundancy.

For India, this was the seventh launch in 2023, which ties its previous annual launch high achieved in both 2016 and 2018. The country however has three more launches tentatively scheduled for this year, though none has as yet a specific launch date.

The leaders in the 2023 launch race:

60 SpaceX
38 China
12 Russia
7 Rocket Lab
7 India

In the national rankings, American private enterprise still leads China in successful launches 69 to 38. It also leads the entire world combined, 69 to 62, while SpaceX by itself now trails the rest of the world (excluding American companies) 60 to 62. SpaceX however has launches scheduled for September 2nd and 3rd, so these numbers are likely to change.

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September 1, 2023 Quick space links

5:05 pm

Courtesy of BtB’s stringer Jay.

 

 

 

  • The Perseverance team posts another dumb tweet making believe the rover is some cute person

    • The tweet includes an image looking towards the western rim of Jezero Crater, but they don’t tell us that. Instead, the tweet says: “I’ve had a great time here poking around the ancient riverbed. Gonna wrap up a few tasks and hit the road soon. What’s over this next rise? Let’s find out”

    Jay writes, “I really don’t care for them to make Perseverance sound like a person. Don’t get me wrong, it is a marvelous piece of engineering, but it is not a person. I know they do this to make Mars more interesting to the general public.”

    I say, “Why are you insulting my intelligence?” Not only isn’t Perseverance a person, to make believe it is on the stupid assumption that is the only way anyone will become interested reveals your utter contempt for the general public. Please stop!

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Real pushback: School district immediately cancels ban on prayer when threatened with lawsuit

1:27 pm

The First Amendment, becoming accepted once again
The First Amendment, becoming accepted once again

Bring a gun to a knife fight: When the officials at West Shore School District in Pennsylvania sent out a letter to the presidents of the various booster clubs at its schools ordering them to “halt prayers at future banquets, and at any other school-sponsored activity” and claiming falsely that “student-initiated prayers at school events are illegal,” two non-profit free speech legal firms, First Liberty and the Independence Law Center teamed up to immediately send a letter to the district challenging that order:

First Liberty and our friends at the Independence Law Center quickly sent a letter to district officials asking them to immediately rescind that threatening letter. Our legal team offered to help draft a new letter and policies to ensure the district would not illegally discriminate against students and staff.

We explained in our letter that the First Amendment prohibits a school district from acting in a hostile manner toward religious belief.

To my readers this story is familiar. What has normally happened next in the past few years — since censorship and blacklisting has become all the rage by those in power — is that the government officials either ignore the letter or publicly defy it. Sometimes they double down and actually fire someone for exercising their First Amendment rights. What follows next is of course a lawsuit, which almost routinely ends in a crushing defeat for the school that costs it significantly in damages.

This story however ended quite differently:
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Petrified dunes on Mars?

11:27 am

Petrified dunes on Mars?
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on May 31, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

I think the many parallel ridges are likely hardened and petrified dunes of sand because of their craggy nature. Dunes of sand would have a smoother, softer look, and in fact, if you look at some of the dunes inside the depression at the bottom-right of the picture you will see ridges with exactly that look, smooth and curved.

Nor is it unreasonable to believe these ridges are petrified dunes, as orbital data over time has found that many of the dunes on Mars, even those that look active, are not and have likely been hardened for centuries.

As for the ridges running at right angles to each other in the picture’s middle left, I have no idea. Possible we are looking at ancient dykes of lava that pushed up through cracks and faults, but this is pure guess.
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