Messier 99, also known as M99, the Coma Pinwheel or NGC 4254, is a spiral galaxy in the constellation Coma Berenices and a member of the Virgo Cluster, discovered by Pierre Mechain in 1781. It lies roughly 50 to 56 million light-years from Earth and displays a notably asymmetric, grand-design spiral structure, with one arm more extended than the other, an effect attributed to gravitational interaction with a neighboring galaxy.
Facts
Classification
Constellation Discovery Year In the Other Atlases
In Constellation
Also in Divinity Atlas: the constellation this subject lies in.
Sources
1. Wikipedia (space and spaceflight articles)
Wikimedia Foundation
2. Wikidata: Messier 99
Messier 99 (Wikipedia)
Messier 99, Wikipedia - lead section, catalogue classification
Messier 99 or M99, also known as NGC 4254 or St.
Messier 99, Wikipedia - lead section, constellation
Catherine's Wheel, is a grand design spiral galaxy in the northern constellation Coma Berenices approximately 15,000,000 parsecs (49,000,000 light-years) from the Milky Way.
- In Group: Spiral Galaxies, infobox 'type' field: SA(s)c (NED classification, de Vaucouleurs system) filed under Spiral Galaxies
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