| This was done by using Hubble to peer halfway across the universe to find ancient exploding stars called supernovae. |
| Both supernovae and the rare but brilliant gamma-ray bursts are cosmic explosions marking the deaths of massive stars. |
| The explosions of low-mass stars can be triggered by the accretion of mass from a companion star in a binary system to create classical, or Type Ia, supernovae. |
| With all their brightness, supernovae gradually die away as a result of internal explosions of unsurpassable intensity. |
| From the high lancets, sunlight streamed in, and the dust motes flared like supernovae as they passed into the light. |
| Supernovae appear in spiral galaxies like M81 on average once every 100 years or so. |
