Cyndi Lauper – She Bop
An evening pause: Performed live in Japan, around 1986.
Hat tip Judd Clark, who describes this accurately as “appealingly bizarre.” To me it simply shows how Cyndi Lauper had a humble sense of humor.
Category: Behind The Black
September 13, 2023 Quick space links
Courtesy of BtB’s stringer Jay.
- Germany to sign Artemis Accords tomorrow
I will put up a full post when this tweet is confirmed.
- First two test Kuiper satellites are now scheduled for launch in October, and will also test technology for reducing interference with ground-based astronomy
ULA switched the launch to an Atlas-5 because of the delays with Vulcan.
- Rocket Lab’s CEO recently sold $22 million in his stock holdings
The tweet suggests that this sale, plus the small profits in the last quarter, are the reasons why the stock has dropped in the past week. Longer term however the stock remains higher than the numbers prior to July.
- Arianespace chart suggests Vega-C will not return to fly any earlier than mid- to late- 2024
The chart also suggests that Arianespace plans two launches of the older Vega rocket first.
- Video showing how SpaceX fishes a Falcon 9 fairing half from the water
The footage was taken next to a pier, so this was likely not part of a recovery right after launch.
Moon’s south pole permanently shadowed regions are younger than expected
Click for original image.
A new long range model of the Moon’s orbit and rotational tilt now suggests that the permanently shadowed regions (PSRs) in its south polar regions are much younger than previous predicted, which reduces the likely amount of ice that has been preserved there.
The map of the south pole region to the right, reduced, sharpened, and annotated to post here, shows the locations of those shadowed regions, with their predicted ages indicated by the colors (Gyr = billion years). Note that the Nova-C lander, planned for launch in mid-November, will land somewhat near some relatively young PSRs, as indicated by the red cross. From the press release:
“We calculated the lunar spin axis orientation and the extent of PSRs based on recent advances for the time evolution of the Earth-Moon distance,” he said. Early in its history, the Moon (which is 4.5 billion years old) was bombarded by comets and volcanism released water vapor from its interior, but continuously shadowed areas started to appear only 3.4 billion years ago. By that time these processes had started to die down, so most of the water that was delivered to the Moon or outgassed from its interior could not have been trapped in the polar regions. Any ice in the polar regions today must have a more recent origin.
“We have been able to quantify how young the lunar PSRs really are,” Schorghofer said. “The average age of PSRs is 1.8 billion years, at most. There are no ancient reservoirs of water ice on the Moon.”
Since other data suggests the presence of ice, it is possible that these reserves are regularly renewed by the arrival of impacts. It also suggests however that there might be less ice available than hoped. Above all, the red colored regions appear to be the most valuable real estate to explore first.
Note: The landing sites for both India’s Vikram lander and Russia’s Luna-25 lander were well beyond the map’s upper right edge, far outside the region where any permanently shadowed craters are located. The news outlets that talked about finding water or ice on either mission were simply illustrating their ignorance and sloppy reporting.
Pushback: The momentum builds against the Marxist American Library Association
Emily Drabinski, president of the ALA and proudly
Marxist and queer
Bring a gun to a knife fight: Back in July I reported how the library commission of Montana had decided to withdraw its support from and membership in the American Library Association (ALA), not only because of the Marxist agenda being pushed by its new president, Emily Drabinski, but because of the ALA’s aggressive effort to insert pornography in school libraries.
At the time I wrote this:
[I]f more local library organizations followed through as Montana has, the ALA might finally feel the pinch and rethink its policies. Or if it didn’t, it would justify these libraries leaving its fold, as it does not represent them.
Since then there has been a rising flood of other states moving to break free from the ALA. In July, almost immediately after the decision in Montana, the secretary of state of Missouri, who oversees the Missouri State library, withdrew from the ALA, citing the organization’s public effort — pushed under Drabinski’s leadership — to block a “faith-based publisher from holding story hours in libraries.”
» Read more
The drying out of Mars’ tropics
Click for original image.
Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on June 26, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The science team calls the features surrounding these small 20 to 60 foot high hills “polygon features,” an apt description and a geological feature that is seen in many places on Mars.
When these features are found in the icy higher latitudes, it is believed they are formed in connection to the freeze-thaw cycle that causes cracks in the near surface ice. When found in the dry equatorial regions, where these polygons are located, they are usually thought to be ancient evidence of past standing water that left behind these cracks, much like the cracks seen in mud after the water has evaporated away on Earth.
The formation of these tiny hills is a bit more complex.
» Read more
Chandra: New X-ray composite images of galaxies and supernovae remnants
Click for original image.
The science team for the Chandra X-Ray observatory today released five new composite images of two galaxies, two supernovae remnants, and the center of the Milky Way, combining data from multiple telescopes looking in radio, infrared, optical, and X-ray wavelengths.
The image to the right, reduced and sharpened to post here, is one of those pictures. From the press release:
As the galaxy moves through space at 1.5 million miles per hour, it leaves not one — but two — tails behind it. These tails trailing after ESO 137-001 are made of superheated gas that Chandra detects in X-rays (blue). ESO’s Very Large Telescope shows light from hydrogen atoms (red), which have been added to the image along with optical and infrared data from Hubble (orange and cyan).
The inset shows just the Hubble optical image, reduced by about 50%, to get a clearer sense of the galaxy itself. It appears to be a jelly-fish galaxy, flying through space at right angles to its plane and with tendrils of stars trailing off below.
The other four images are as interesting. The full set, including separate images in the individual wavelengths prior to combination, can be found here.
Update on the status of Vulcan, Ariane-6, and New Glenn
Link here. This excellent article is focused on whether these three new rockets, none of which has yet completed its first test flight, will be able to meet their launch contract obligations with Amazon, which needs to launch at least 1,600 satellites of its Kuiper broadband constellation by July 2026 to meet its FCC license requirements. Those requirements also obligate Amazon to have the full constellation of about 3,200 satellites in orbit by July 2029.
The launch contracts to these three untried rockets was the largest such contract ever issued, involving 83 launches and billions of dollars.
To sum up where things stand in terms of the first test launch of each rocket:
» Read more
New Shepard remains grounded, a year after launch failure
More than five months after completing its mishap investigation of the New Shepard launch failure one year ago, Blue Origin’s suborbital spacecraft remains grounded, with no clear indication when it will fly again.
In March, Blue Origin announced the results of its anomaly investigation: The nozzle on the first stage’s single BE-3PM engine suffered a “thermo-structural failure,” which caused a thrust misalignment and brought the mission to a premature end.
In its March 24 announcement, Blue Origin said that it had begun implementing some corrective actions, “including design changes to the combustion chamber and operating parameters, which have reduced engine nozzle bulk and hot-streak temperatures.” The company also stressed that it expected to return to flight “soon,” with a re-launch of those same 36 research payloads.
Almost six months later, that “soon” has translated into “someday.” It seems the slow pace of everything Blue Origin does has now taken over its one successful operational product. It has released no information about a new flight schedule, or even the present status of the spacecraft.
The result? Even though Blue Origin was flying commercial suborbital flights regularly about two years earlier that Virgin Galactic, the latter company has now completed more flights. This slow pace is not how a commercial company driven to earn profits and compete successfully operates. In the end it drives away customers, while ceding market share to competitors.
Astronomers discover two new polar-ring galaxies
Click for original image.
Using a combination of optical and radio telescopes as well as computer modeling, astronomers think they have identifed polar rings of gas orbiting two different galaxies, adding these to the relatively small population of known polar-ring galaxies.
Polar ring galaxies are unique in that they have an outer ring of gas and stars circling the galaxy at right angles to its plane. A composite image of one of these new galaxies is to the right, cropped, reduced and sharpened to post here. From the press release:
Jayanne English, a member of the WALLABY research team and also an expert in astronomy image-making at the University of Manitoba, developed the first images of these gaseous polar ring galaxies using a combination of optical and radio data from the different telescopes. First, optical and infrared data from the Subaru telescope in Hawaii provided the image for the spiral disk of the galaxy. Then, the gaseous ring was added based on data obtained from the WALLABY survey, an international project using CSIRO’s ASKAP radio telescope to detect atomic hydrogen emission from about half a million galaxies.
The creation of this and other astronomical images are all composite because they include information that our eyes can’t capture. In this particular case, the cold hydrogen gas component, invisible to the human eye, is seen in radio “light” using CSIRO’s ASKAP. The subtle colour gradient of this ring represents the orbital motions of the gas, with purple-ish tints at the bottom tracing gas that moves towards the viewer while the top portion moves away. The emission from the ring was separated from the radio emission emanating from the disk of the galaxy using virtual reality tools, in collaboration with Professor Tom Jarrett (University of Cape Town, South Africa).
As the abstract of the research paper notes, the computer models used “show that the data are consistent with PRGs [polar-ring galaxies] but do not definitively prove that the galaxies are PRGs.” There is much uncertainty, as it is difficult to determine the orientation of some rings relative to their galaxy’s plane.
Nonetheless, these result suggest polar ring galaxies might be more common, and thus might help refine the theories of galaxy formation and merger.
Starlink and SES team up to provide broadband service to cruise lines
SpaceX’s Starlink constellation and SES’s satellites in higher orbits are forming a partnership to provide cruise ships better global coverage for broadband.
The SES Cruise mPowered + Starlink service would mostly use SpaceX’s low Earth orbit network (LEO) and satellites in medium Earth orbit (MEO) from SES. In northern and southern regions, apart from the poles where there is no service, SES vice president of product management for maritime products Gregory Martin said their joint offering would leverage its geostationary satellites.
SES would sell and manage the multi-orbit service when it becomes operational later this year and SpaceX would get a cut of the sales, Martin told SpaceNews in an interview.
It appears by partnering their services, the two companies make the deal better for cruise companies.
The orbits of the nearest stars orbiting the Milky Way’s central black hole are impossible to predict
The uncertainty of science: Using a computer program developed in 2018 that can predict with accuracy the orbits of more than three interacting objects, scientists have found that the orbits of the 27 nearest stars orbiting the Milky Way’s central black hole, Sagittarius A* (pronounced A-star) are impossible to predict after only a very short time.
“Already after 462 years, we cannot predict the orbits with confidence. That is astonishingly short,” says astronomer Simon Portegies Zwart (Leiden University, the Netherlands). He compares it to our solar system, which is no longer predictable with confidence after 12 million years. “So, the vicinity of the black hole is 30,000 times more chaotic than ours, and we didn’t expect that at all. Of course, the solar system is about 20,000 times smaller, contains millions of times less mass, and has only eight relatively light objects instead of 27 massive ones, but, if you had asked me beforehand, that shouldn’t have mattered so much.”
According to the researchers, the chaos emerges each time in roughly the same way. There are always two or three stars that approach each other closely. This causes a mutual pushing and pulling among the stars. This in turn leads to slightly different stellar orbits. The black hole around which those stars orbit is then slightly pushed away, which in turn is felt by all the stars. In this way, a small interaction between two stars affects all 27 stars in the central cluster. [emphasis mine]
To my mind, the quote by the scientist above should be considered the most absurd statement by a scientist ever spoken, except that nowadays scientists make such idiotic statements all the time. To think that such different conditions wouldn’t produce different results suggests a hubris that is astonishing for a person supposedly trained in the scientific method.
Regardless, these results suggest that acquiring an understanding of the dynamics that created these stars is going to be very difficult, if not impossible. The conditions change so rapidly, and in an unpredictable manner, that any theory proposed will be simply guessing.
Jools Holland and the Playboys – Highwire
An evening pause: For those familiar with the 1960s British television show, Danger Man (which in the U.S. was titled Secret Agent) starring Patrick McGoohan (more famous for the later spy series The Prisoner), this music will be very familiar. It was written by Edwin Astley, was the theme music for the second iteration of the British release. In the American release it was used as background music throughout the show. You can watch the entire series here. It has what I call muscle, and is well worth your time.
Hat tip Wayne DeVette.