The Space Thread

[MaartenVC]

 

[Nebraska]

Quote

A new investigation with NASA’s James Webb Space Telescope into K2-18 b, an exoplanet 8.6 times as massive as Earth, has revealed the presence of carbon-bearing molecules including methane and carbon dioxide. Webb’s discovery adds to recent studies suggesting that K2-18 b could be a Hycean exoplanet, one which has the potential to possess a hydrogen-rich atmosphere and a water ocean-covered surface.

https://www.nasa.gov/universe/exoplanets/webb-discovers-methane-carbon-dioxide-in-atmosphere-of-k2-18-b/

[decibal cooper]

Sun Ra applied for a NASA grant to make music for their space program

[cern]

37 minutes ago, decibal cooper said:

Sun Ra applied for a NASA grant to make music for their space program

It is some cool thing to do but why does it look like a language test for school kids age 12? 

[Nebraska]

 

A Hubble Space Telescope image of the host galaxy of an exceptionally powerful fast radio burst, FRB 20220610A. Hubble’s sensitivity and sharpness reveals a compact group of multiple galaxies that may be in the process of merging. They existed when the universe was only 5 billion years old. FRB 20220610A was first detected on June 10, 2022, by the Australian Square Kilometer Array Pathfinder (ASKAP) radio telescope in Western Australia. The European Southern Observatory’s Very Large Telescope in Chile confirmed that the FRB came from a distant place.

https://hubblesite.org/contents/media/images/2024/001/01HK5FQ72Z75MJJKSAXFEC8GHV

https://science.nasa.gov/missions/hubble/hubble-finds-weird-home-of-farthest-fast-radio-burst/

[t yst r]

Largest ever black hole jet pair discovered in the distant Universe

An enormous pair of black hole jets has been discovered by an international team of astronomers. Given the nickname Porphyrion after a mythological Greek giant, the jets are the biggest ever observed, spanning 23 million light years across and having a total power output equivalent to trillions of Suns.

"This pair is not just the size of a solar system or a Milky Way; we are talking about 140 Milky Way diameters in total," said Dr Martijn Oei, one of the study authors from the California Institute of Technology. “The Milky Way would be a little dot in these two giant eruptions."

 

https://www.sciencefocus.com/news/largest-ever-black-hole-jets

[Rubin Farr]

https://www.livescience.com/physics-mathematics/quantum-physics/stephen-hawking-s-black-hole-radiation-paradox-could-finally-be-solved-if-black-holes-aren-t-what-they-seem

[zazen]

46 minutes ago, Rubin Farr said:

https://www.livescience.com/physics-mathematics/quantum-physics/stephen-hawking-s-black-hole-radiation-paradox-could-finally-be-solved-if-black-holes-aren-t-what-they-seem

"The frozen star is a non-singular, ultracompact object that, to an external observer, looks exactly like a Schwarzschild black hole, but with a different interior geometry and matter composition. The frozen star needs to be sourced by an extremely anisotropic fluid, for which the sum of the radial pressure and energy density is either vanishing or perturbatively small. Here, we show that this matter can be identified with the string fluid resulting from the decay of an unstable D-brane or a brane-antibrane system at the end of open-string tachyon condensation. The string fluid corresponds to flux tubes emanating from the center and ending at the Schwarzschild radius of the star. The effective Lagrangian for this fluid can be recast into a Born-Infeld form. When the fluid Lagrangian is coupled to that of Einstein's Gravity, the static, spherically symmetric solutions of the equations of motion are shown to be the same as those describing the frozen star model. Frozen stars can therefore be viewed as gravitationally back-reacted BIons."

Yes I've often thought that.

Seriously though there are some models of black-hole-type things that avoid a singularity and its an interesting approach to take - perhaps singularities just can't happen in the real universe for some reason and we are chasing down a blind alley with all this black hole stuff. It would sortof make sense that "cmon infinitely dense things can't really exist". Another take on this is https://en.wikipedia.org/wiki/Magnetospheric_eternally_collapsing_object

[EdamAnchorman]

37 minutes ago, zazen said:

perhaps singularities just can't happen in the real universe for some reason and we are chasing down a blind alley with all this black hole stuff. It would sortof make sense that "cmon infinitely dense things can't really exist". 

Could also be that we're just not using the correct math to treat objects which "appear" to show singularities.

Edited Saturday at 09:55 PM by EdamAnchorman

[Rubin Farr]

Comet filmed from the ISS