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Asteroids and Supernovae

23 March 2024
Astronomy, cosmology

At https://spaceweather.com … March 18th 2024 [see archive dates] – we have a canyon of fire eruption on the face of the Sun whilst Comet 12p/Pons-Brooks, now has a bent tail – as a result of interaction with the solar wind. A direct hit by a CME … we are told  https://www.livescience.com/space/asteroids/potentially-hazardous-asteroid-bennu-contains-the-building-blocks-of-life-and-minerals-unseen-on-earth-scientists-reveal-in-1st-comprehensive-analysis   … after NASAs OSIRIS Rex collected samples from the surface of the asteroid Bennu, scientists now say there is a surprising reservoir of a mineral, magnesium phosphate. There is also a lot of glycine, an ingredient of proteins, as well as other water bearing minerals such as carbonates, sulfites, olivine, and magnetite.

At https://phys.org/news/2024-03-year-asteroid-impact-seafloor-spherules.html … iron containing spherules on the sea floor. How did they get there? A meteor perhaps. This view is challenged in a paper currently at the pre-print server arXiv – go to https://arxiv.org/abs/2403.05161 … It suggests the spherules were formed by an impact event – suitably placed in the distant past, 790,000 years ago. The location, near Papua New Guinea, may be part of the Australasian tektite strewn field – hence the estimated date.

At https://www.sciencedaily.com/releases/2024/03/240313135615.htm … exploring what was left behind from a supernova  explosion seen in 1987 – a string of pearls. Apparently, Rayleigh-Taylor instabilities form in plasmas – but does that explain the ring of hydrogen clumps left behind by supernova 1987A? A simulation, once again. Interesting research.

At https://phys.org/news/2024-03-spacex-3rd-starship-space-lost.html … the third proto Starship launched by Elon Musk’s Space X, can be seen entering earth’s atmosphere and heating up and disappearing from view [on the video inside the starship]. It is a super heavy rocket and it completed its third orbital test flight from Texas. On the way down it heated up after re-entering, as a result of plasma, it is suggested. However, another starship will be ready to launch later in the year. Plasma built up around the starship as it entered the 62 mile altitude level, showing up in the video as waves. The super hot plasma grew in real time.

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