Hans Bakken

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Hans Bakken
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Companion star hidden for 21 years in a supernova's glare  Using NASA’s Hubble Space Telescope, astronomers have discovered a companion star to a rare class of supernova, known as a Type IIb. The discovery confirms a long-held theory that the supernova, dubbed SN 1993J, occurred inside what is called a binary system, where two interacting stars caused a cosmic explosion.

Hubble Finds Supernova Companion Star after Two Decades of Searching. Using the Hubble Space Telescope, astronomers have identified the blue helium-burning companion star, seen at the center of the expanding nebula of debris from the supernova.

The Moon Map

"One small step for man, one giant leap for mankind". But before we ever landed on the moon, millions of asteroids slammed into it. Now each of those tiny craters has a name, as do the large "seas"