youtu.be/MZzFjeQFpro?...
youtu.be/MZzFjeQFpro?...
youtu.be/q6ke-bfXSBg?...
youtu.be/q6ke-bfXSBg?...
en.wikipedia.org/wiki/Heart_N...
en.wikipedia.org/wiki/Heart_N...
It formed when a star became a red giant around 400,000 years ago, creating two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.
en.wikipedia.org/wiki/Crescen...
It formed when a star became a red giant around 400,000 years ago, creating two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.
en.wikipedia.org/wiki/Crescen...