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astronomersScientific American
•77% Informative
Every 80 years or so it dramatically brightens, going from obscurity to one of the 200 brightest stars in the sky in just a matter of hours .
The last time it did this was in 1946 , so you might expect it won’t again until 2026 , two years from now .
T Coronae Borealis , or T Cor Bor , is a binary star system with two stars that orbit each other.
The two stars are so close together that the white dwarf can physically pull material away from the red giant.
T Cor Bor will blow its top at least twice in the past, in 1866 and 1946 .
The system is a subclass of nova called a recurrent nova .
It's in the constellation of Corona Borealis , the northern crown.
Once it blows, it should be brighter than any of the stars in the immediate constellation.
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