Astronomers find signatures of a 'messy' star that made its companion go supernova

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 Top Technology News -- ScienceDaily http://bit.ly/2M2U0Ek