Glossary term: Messier Object

Description: A Messier object is one of the 110 nebulous-appearing objects first catalogued by Charles Messier and Pierre Mechain in 1781. In its present form, the catalogue contains 55 star clusters, 39 galaxies, 11 true nebulae, and 5 star groupings. These objects are favorite targets for amateur astronomers to observe.

Related Terms:

See this term in other languages

Term and definition status: This term and its definition is still awaiting approval

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".