Space and Astronomy Megathread (MERGED) - Part 1

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Dragon Aurora over Iceland
Image Credit & Copyright: Jingyi Zhang & Wang Zheng
 
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The Orion You Can Almost See
Image Credit & Copyright: Michele Guzzini
 
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Star Cluster IC 348 from Webb
Image Credit: NASA, ESA, CSA, STScI, and K. Luhman (Penn State U.) and C. Alves de Oliveira (ESA)
 
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Star Cluster IC 348 from Webb
Image Credit: NASA, ESA, CSA, STScI, and K. Luhman (Penn State U.) and C. Alves de Oliveira (ESA)
 
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America and the Sea of Serenity
Image Credit & Copyright: Gene Cernan, Apollo 17, NASA; Anaglyph by Patrick Vantuyne
 

There is another candidate black hole — Phoenix A — which may be quite a bit larger. However, According to Science™, Phoenix A exceeds the theoretical maximum for black hole size. So the assumption is that there’s something off about the measurement. Whereas, the size estimate of Ton 618 is more solid.

Note that the relative size comparison is to Earth’s orbit, which is approx. 300 million kilometers. The Sun’s diameter is tiny in comparison. And the Earth would be microscopic.
 

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