megaparsecs
/ˈmɛɡəˌpɑrsɛks/
noun
- A unit of distance used in astronomy, equal to one million parsecs (about 3.26 million light-years).
- The Andromeda Galaxy is about 0.75 megaparsecs away from Earth.
- The distance between galaxy clusters is often given in megaparsecs.
- Astronomers measure the expansion of the universe in megaparsecs.