@Cosmos_elementary

@Cosmos_elementary

Cosmos:elementary | Black holes are less dense than water? What? @Cosmos_elementary | Uploaded December 2019 | Updated October 2024, 8 hours ago.
“Supermassive black holes’ density is lower than density of water”. Sometimes people are confused with statements like this one. How can that be if black holes are thought to be the densest objects is the Universe? We are going to figure it out in this video.

Sources:
wolframalpha.com

Forbes article I mention
forbes.com/sites/quora/2016/07/06/an-astrophysicist-debunks-3-popular-misconceptions-about-black-holes/#45d52c1b1b8e
Cygnus X-1 mass
arxiv.org/abs/1106.3689
Density of water
thoughtco.com/what-is-the-density-of-water-609413
Sagittarius a* mass
arxiv.org/abs/1607.05726
M87 black hole mass
eventhorizontelescope.org/press-release-april-10-2019-astronomers-capture-first-image-black-hole
Density of air
thoughtco.com/density-of-air-at-stp-607546
The most massive black hole
arxiv.org/pdf/1907.10608.pdf
Sun facts
nssdc.gsfc.nasa.gov/planetary/factsheet/sunfact.html
solarscience.msfc.nasa.gov/interior.shtml
Event horizon
http://astronomy.swin.edu.au/cosmos/E/Event+Horizon
Black holes’ structure
space.com/19339-black-holes-facts-explained-infographic.html
http://minerva.union.edu/vianil/web_stuff2/Structure_of_Black_Holes.htm
Kerr black holes
arxiv.org/pdf/0706.0622.pdf

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$Myths and misconceptions about the speed of light There are lots of Myths and misconceptions about the speed of light, and I’m going to cover several of them in this video. Veritasium video https://www.youtube.com/watch?v=pTn6Ewhb27k PBS Space time on Speed of Causality https://www.youtube.com/watch?v=msVuCEs8Ydo Tom Scott’s video https://www.youtube.com/watch?v=tozuzV5YZ7U Sources: Speed of https://www.forbes.com/sites/quora/2018/07/02/does-anything-other-than-light-travel-at-the-speed-of-light Speed of gravity https://www.sciencealert.com/speed-of-gravitational-waves-and-light-same Sean M. Carroll’s interview https://www.youtube.com/watch?v=fOeLjD-dZjc Graviton http://curious.astro.cornell.edu/physics/137-physics/general-physics/particles-and-quantum-physics/813-what-is-a-graviton-intermediate Neutrinos and supernovae https://physicsworld.com/a/new-correction-to-speed-of-light-could-explain-sn1987-neutrino-burst/ Speed of causality https://www.forbes.com/sites/jillianscudder/2016/06/24/is-cause-effect-limited-by-the-speed-of-light/?sh=514116221a58 https://www.sciencealert.com/watch-why-the-speed-of-light-is-not-about-light Why it slows down https://moviesandscience.com/blog/science/refractive-index http://curious.astro.cornell.edu/about-us/133-physics/general-physics/general-questions/832-is-the-speed-of-light-constant-beginner Polariton https://www.sciencedirect.com/topics/chemistry/polariton https://mappingignorance.org/2018/01/25/what-on-earth-is-a-polariton/ https://www.nature.com/subjects/polaritons Freezing of light https://www.sciencedaily.com/releases/2013/08/130806111151.htm https://physics.aps.org/articles/v6/80 https://physics.aps.org/articles/v10/s25 Speed limit https://www.forbes.com/sites/startswithabang/2018/10/09/the-universe-has-a-speed-limit-and-it-isnt-the-speed-of-light/?sh=a782bac75549 How to measure it https://arxiv.org/pdf/2012.12037.pdf https://www.universetoday.com/149554/theres-no-way-to-measure-the-speed-of-light-in-a-single-direction/ https://arxiv.org/ftp/arxiv/papers/1011/1011.1318.pdf https://users.physics.ox.ac.uk/~rtaylor/teaching/specrel.pdf https://link.springer.com/article/10.1007/s10701-020-00337-5 https://link.springer.com/article/10.1140/epjd/e2012-20524-8 https://arxiv.org/pdf/1212.2259.pdf https://arxiv.org/pdf/1310.1171.pdf https://arxiv.org/pdf/0911.3616.pdf https://aapt.scitation.org/doi/10.1119/1.3160665 https://www.scienceabc.com/pure-sciences/could-what-we-consider-as-the-speed-of-light-be-wrong.html https://spaceaustralia.com/news/one-way-speed-light https://plato.stanford.edu/entries/spacetime-convensimul/ https://link.springer.com/article/10.1007/s12648-012-0112-4 Galaxy distortions https://sites.ualberta.ca/~pogosyan/teaching/ASTRO_122/lect24/lecture24.html https://www.universetoday.com/21998/the-diameter-of-the-milky-way/ https://astronomy.stackexchange.com/questions/43739/how-distorted-will-our-galaxy-be-if-we-are-viewing-it-from-several-thousand-ligh$

The end of our Galaxy #science #space #cosmos_elementary

What if the black hole dissapeared from the galactic center?

Black holes are less dense than water? What? @Cosmos_elementary