A companion star previously buried in the brilliance of its partner's supernova has been discovered by NASA's Hubble

The reason for the hydrogen loss was unknown, therefore astronomers used Hubble to look for clues and test

Two out of two?

Scientists previously thought that the tremendous winds of a giant progenitor star could sweep away its hydrogen

One to Watch

The progenitors of entirely stripped-envelope supernovae have been difficult to discern in pre-explosion photos,