accretion

Why Isn’t Jupiter a Star?

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The smallest known main-sequence star in the Milky Way galaxy is a real pixie of a thing. It’s called EBLM J0555-57Ab, a red dwarf 600 light-years away. With a mean radius of around 59,000 kilometers, it’s just a smidge bigger than Saturn. That makes it the tiniest known star to support hydrogen fusion in its core, … Read more

We Have The First Direct Evidence of a White Dwarf Violently Ripping Apart a Planet

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Black holes may be well known for their gluttonous tendencies, but they’re not the only dead stars capable of slurping down passing objects. For years, evidence has been mounting that white dwarf stars also have a penchant for snacking – and on their own planets, no less.   Now, for the first time, astronomers have … Read more

Astronomers Spot a Ghostly ‘One-Winged Butterfly’ Blazing Through Space

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The beautiful birth of a star has produced an exquisitely ethereal structure in interstellar space. It’s called the Chamaeleon Infrared Nebula, located about 520 light-years away, and in a new image from the NSF NOIRLab’s International Gemini Observatory in Chile, it appears in the sky like a pale gossamer butterfly wing.   At its core, … Read more