Danish astronomer Tycho Brahe saw a "new and unusual star" in the November 1572 sky. He called it a new star, or "stella nova". This astronomical event changed the way the scientific world viewed the ...

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Cambridge, MA – Since Galileo first pointed a telescope at the sky 400 years ago, a myriad of technological advances have allowed astronomers to look at very faint objects, very distant objects, and ...

A mysterious remnant from a rare type of supernova recorded in 1181 has been explained for the first time. Two white dwarf stars collided, creating a temporary 'guest star,' now labeled supernova (SN) ...