Use Charles Messier's Catalog with your students to learn about the universe!
The Messier Catalog is a list of the best-known objects in the universe. Whenever you encounter a deep space object with an "M-number" such as M1, the Crab Nebula, you are being directed to the Messier Catalog. It contains star clusters such as M13, the Hercules Cluster, nebulas (nebulae) such as the Lagoon (M8) and Orion (M42), and galaxies such as Andromeda (M31), the Whirlpool (M51), and the Sombrero (M104).
The C