This Nebula Is Disappearing Absurdly Fast | SciShow News

The video explores the Stingray Nebula, a planetary nebula that is dimming much faster than expected. This unusual behavior is linked to the central star, which is still in the process of dying and has recently expanded and cooled, emitting less radiation. Researchers hypothesize that a helium flash might have caused this change, but the star's current mass doesn't align with this theory. The situation is unprecedented, and ongoing observations are needed to understand the nebula's evolution and the star's behavior.

What hypothesis do researchers have regarding the cooling of the central star in the Stingray Nebula?

What implications does the fading of the Stingray Nebula have for our understanding of nebulae?