Supernova (noun)

1. A powerful explosion that occurs at the end of the life of certain types of stars, resulting in an extremely bright, short-lived object that emits vast amounts of energy.
2. A star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.

Origin:

From the combination of the words "super" and "nova" which means a new star of extraordinary brightness.

Examples:

1. Supernova explosions are some of the most energetic events in the universe.
2. The supernova was so bright that it could be seen from Earth.
3. Supernovae are responsible for creating many of the elements in the universe.
4. Scientists study supernovae to learn about the lives and deaths of stars.
5. The remnants of a supernova can be observed as a supernova remnant, such as SN1987A.