A to Z Black Hole : (Y) Yellow Hypergiants

The Predecessors: Yellow Hypergiants
Before there is a black hole, there must be a star. NASA tracks rare "Yellow Hypergiants"—stars so massive and unstable that they are in a constant state of transition. These stars are among the largest in the universe, and because they burn through their fuel so quickly, they are destined to end in a supernova and leave a black hole behind.
​Top-Tier Insights:
​Size Comparison: If you placed a Yellow Hypergiant like HR 5171A in the center of our solar system, its surface would extend beyond the orbit of Jupiter.
​Atmospheric Loss: These stars are so "puffy" and unstable that they lose their outer layers to space, creating a massive shell of dust around them before they explode.
​Evolutionary Link: NASA’s Hubble has observed these stars to understand the "missing link" in how the most massive stars evolve into stellar-mass black holes.

​Source: NASA / ESA / European Southern Observatory (ESO).

​Tags: #NASA #CosmicGleam #YellowHypergiant #StarDeath #BlackHole #SpaceFacts #AtoZSeries #Astronomy #Hubble

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