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Planetary nebulae like the Crystal Ball Nebula (NGC 1514) are sort of like stellar obituaries. Though crystal balls supposedly reveal the future, the Crystal Ball Nebula tells us more about the past.

Hubble Telescope image of the Horsehead Nebula. Credit: T.A.Rector (NOIRLab/NSF/AURA) & Hubble Heritage Team (STScI/AURA/NASA) Nebulae are all but impossible to spot in the night sky, but you'd never ...