Nova (noun)

1. An astronomical event in which a star suddenly increases in brightness and then fades back to its original brightness over a period of several weeks or months.
2. A star undergoing such an event.

Origin:

Derived from the latin word nova, meaning 'new', which is used in reference to a new star that suddenly appears in the sky.

Examples:

1. The nova was observed by astronomers and studied for its properties and behavior.
2. The nova was so bright that it was visible in the daytime.
3. The nova was caused by a thermonuclear explosion on the surface of the star.
4. The nova was a rare and spectacular event in the galaxy.
5. The nova was recorded by ancient civilizations and used for astronomical calculations.