The first images of supernova SN2007if - the faint host galaxy could not be made out at the time the supernova was discovered. Credit: NBNLFrom Cosmos:
SYDNEY: A star that exceeded its known upper mass limit before turning supernova could change the way scientists measure the expansion of the universe and study dark energy, scientists said.
The researchers, led by experts from Yale University, measured the mass of a supernova thought to belong to a unique subclass, type Ia, and found that it significantly exceeded the upper limit, known as the Chandrasekhar limit - which is 1.4 times the mass of our Sun.
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