News tagged with accretion disks

Dormant black hole eats star, becomes X-ray flashlight

Roughly 90 percent of the biggest black holes in the known universe are dormant, meaning that they are not actively devouring matter and, consequently, not giving off any light or other radiation. But sometimes a star wanders ...

dateJun 22, 2016 in Astronomy
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Cosmic jets light up black hole's snack

A black hole is often thought of as a giant galactic vacuum cleaner constantly sucking in cosmic material, tearing it apart and swallowing it. So black holes should do exactly the same thing with stars, right?

dateDec 16, 2015 in Astronomy
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How massive can black holes get?

Without the light pressure from nuclear fusion to hold back the mass of the star, the outer layers compress inward in an instant. The star dies, exploding violently as a supernova.

dateAug 11, 2015 in Astronomy
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