About this image

This illustration shows the key steps in the evolution of a Type IIb supernova.

Panel 1: Two very hot stars orbit about each other in a binary system.

Panel 2: The slightly more massive member of the pair evolves into a bloated red giant and spills the hydrogen in its outer envelope onto the companion star.

Panel 3: The more massive star explodes as a supernova.

Panel 4: The companion star survives the explosion. Because it has locked up most of the hydrogen in the system, it is a larger and hotter star than when it was born. The fireball of the supernova fades.


Tags
Galaxies, Hubble Telescope, Illustrations, Spiral Galaxies, Stars, Supernovae

Credits

NASA, ESA, and A. Feild (STScI)