Astronomers announced that they have identified the type of companion star that made its partner in a binary system, a carbon-oxygen white dwarf star, explode. Through repeated observations of SN 2015cp, a supernova 545 million light years away, the team detected hydrogen-rich debris that the companion star had shed prior to the explosion.
from All Top News -- ScienceDaily https://www.sciencedaily.com/releases/2019/01/190110160935.htm
from All Top News -- ScienceDaily https://www.sciencedaily.com/releases/2019/01/190110160935.htm
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