noun
- plural of supernova; extremely bright stellar explosions that occur when massive stars collapse and then explode
Usage: astronomy
Examples
- Astronomers detected three supernovas in distant galaxies last month.
- The light from supernovas can outshine entire galaxies for weeks.
- Scientists study supernovas to understand how heavy elements are created.
- Ancient supernovas may have influenced the evolution of life on Earth.
- The Hubble telescope has captured images of several spectacular supernovas.
- Supernovas scatter elements like iron and gold throughout the universe.