Space Stuff

What the image of the Milky Way’s black hole really shows​

Swirling plasma around its edges will reveal more about galaxy’s history, evolution.​

To create the first image of the Milky Way’s black hole, scientists ran numerous simulations of the swirling envelope of plasma that encircles it.

Enlarge / To create the first image of the Milky Way’s black hole, scientists ran numerous simulations of the swirling envelope of plasma that encircles it.
 

Strange black hole merger may have been a rare random encounter​

Instead of an orbiting binary, two black holes may have met by chance.​

A field of stars with distortion and two black objects at the center.

Simulation of two black holes poised on the verge of a collision.

The advent of gravitational wave detectors—there are now four of them—has recorded a steady flow of black hole mergers. As far as we can tell, almost all of them have behaved exactly as we would expect for the sorts of events that we had predicted would produce them: a pair of orbiting black holes that gradually spiral inward until they meet at their mutual center of gravity.
 
Robert said:

Strange black hole merger may have been a rare random encounter​

Instead of an orbiting binary, two black holes may have met by chance.​

A field of stars with distortion and two black objects at the center.

Simulation of two black holes poised on the verge of a collision.

The advent of gravitational wave detectors—there are now four of them—has recorded a steady flow of black hole mergers. As far as we can tell, almost all of them have behaved exactly as we would expect for the sorts of events that we had predicted would produce them: a pair of orbiting black holes that gradually spiral inward until they meet at their mutual center of gravity.
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I wonder, if the pulsar machanism also works in the same way with black holes?
 

Orion soars around the Moon with a lonely Earth in the distance​

The silvery spacecraft is on its way to an elongated orbit around the Moon.​

This image taken by NASA's Orion spacecraft shows its view just before the vehicle flew behind the Moon.

This image taken by NASA's Orion spacecraft shows its view just before the vehicle flew behind the Moon.

NASA's Orion spacecraft flew to within 130 km of the Moon's surface on Monday morning after executing one of the most demanding maneuvers of its 25-day mission.
Since launching on top of the Space Launch System rocket last Wednesday, Orion's European Service Module had conducted four "trajectory correction burns" on the way to the Moon. These were brief firings of the service module's main engine, an Aerojet-built AJ10 engine. However, the propulsion system faced a stiffer test on Monday as part of a maneuver to enter orbit around the Moon. It passed with flying colors.
 

We now know why black hole jets make high-energy radiation​

New data decisively favors shockwave-generated radiation in the jets.​

Image of a bright area with two fingers of material spreading out from it in opposite directions.

The jets of material ejected from around black holes can be enormous.

Active galactic nuclei, powered by the supermassive black holes they contain, are the brightest objects in the Universe. The light originates from jets of material hurled out at nearly the speed of light by the environment around the black hole. In most cases, these active galactic nuclei are called quasars. But, in rare instances where one of the jets is oriented directly toward Earth, they're called a blazar and appear brighter.
While the general outline of how a blazar operates has been worked out, several details remain poorly understood, including how the fast-moving material generates so much light. Now, researchers have turned a new space-based observatory called the Imaging X-ray Polarimetry Explorer (IXPE) toward one of the brightest blazars in the sky. The data from it and other observations combined indicate that light is produced when the black hole jets slam into slower-moving materials.
 
This is a little disappointing.

No sign of the expected lake bed where Perseverance rover landed​

Minerals that normally get altered in watery environments are still present.​

Image of the rover's mast in the red environment of Mars.

No, those donut tracks aren't mine, officer.

The Perseverance rover landed in Mars' Jezero Crater largely because of extensive evidence that the crater once hosted a lake, meaning the presence of liquid water that might once have hosted Martian life. And the landing was a success, placing the rover at the edge of a structure that appeared to be a river delta where the nearby highlands drained into the crater.
But a summary of the first year of data from the rover, published in three different papers being released today, suggests that Perseverance has yet to stumble across any evidence of a watery paradise. Instead, all indications are that water exposure in the areas it explored was limited, and the waters were likely to be near freezing. While this doesn't rule out that it will find lake deposits later, the environment might not have been as welcoming for life as "a lake in a crater" might have suggested.
 
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Robert said:
A wee reminder that Elon Musk is - or at least was - capable of driving amazing and genuinely incredible progress.
https://twitter.com/x/status/1596586894485123072
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yeah, I think some of us can agree elon is occasionally clever. I wish he was still focused on EV's and rockets.

I found this and have no idea how real it is, since i have no source. However, this situation sounds familiar to me. Often, when you try to make films you have to deal with rich people who think their shit doesn't stink. They think they KNOW EVERYTHING, and all those lowly artists are just like insects annoying their god damn genius notions. And, often you have a group of people who have to placate this jackass just so they can keep the money coming to finish the film. I can't be so diplomatic. Which is why I am never part of the asskissing group.

so, it MAY be true about elon.


spaceX.jpg
 

A Soyuz spacecraft started leaking uncontrollably on Wednesday night​

After three hours Wednesday night the leak remained ongoing.​

A view of the aft end of the Soyuz spacecraft leaking what appears to be ammonia on Wednesday night.

A view of the aft end of the Soyuz spacecraft leaking what appears to be ammonia on Wednesday night.

A Russian spacewalk was cancelled at the last minute on Wednesday night when a spacecraft attached to the International Space Station unexpectedly sprang a large leak.
Cosmonauts Sergey Prokopyev and Dmitri Petelin were dressed in spacesuits, with the airlock depressurized, when flight controllers told them to standby while the leak in a Soyuz spacecraft was investigated. The spacewalk was subsequently called off shortly before 10pm ET (03:00 UTC Thursday).
 

Scientists may have found the first water worlds​

Density suggests these "super-Earths" are more like giant, hot Europas.​

Artist's impression of a multi-planet system.

Two planets that were originally discovered by the Kepler mission may not be what we thought they were. Based on an initial characterization, it was thought these planets were rocky bodies a bit larger than Earth. But continued observation has produced data that indicates the planets are much less dense than we originally thought. And the only realistic way to get the sort of densities they now seem to have is for a substantial amount of their volume to be occupied by water or a similar fluid.
We do have bodies like this in our Solar System—most notably the moon Europa, which has a rocky core surrounded by a watery shell capped by ice. But these new planets are much closer to their host star, which means their surfaces are probably a blurry boundary between a vast ocean and a steam-filled atmosphere.
 
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