Advertisement

Advertisement

Messier number

noun

, Astronomy.
  1. a number (preceded by M) designating the 109 double stars, clusters, nebulae, and galaxies in the Messier catalog.


Advertisement

Word of the Day

petrichor

[pet-ri-kawr]

Meaning and examples

Start each day with the Word of the Day in your inbox!

By clicking "Sign Up", you are accepting Dictionary.com Terms & Conditions and Privacy Policies.

Advertisement

Advertisement

Advertisement


Messier cataloguemessieurs