M88 - NGC 4501

Messier 88 (NGC 4501) is a spiral galaxy located approximately 47 million light-years from Earth in the constellation Coma Berenices. It was discovered by Charles Messier in 1781 and is one of the brighter spiral galaxies in the Virgo Cluster, with a visual magnitude of about 9.6. M88 is classified as an SA(rs)b spiral, displaying well-defined, symmetric spiral arms that wind tightly from a bright central bulge. The galaxy is seen at a significant inclination of about 64 degrees from face-on, giving it a notably elongated appearance. M88 spans approximately 130,000 light-years in diameter, making it larger than the Milky Way. The galaxy's spiral arms are rich with dust lanes, blue star-forming regions, and HII regions, and the arms can be traced for nearly a full revolution around the nucleus. M88 is moving through the Virgo Cluster at high velocity and shows signs of ram pressure stripping, where the hot intracluster medium is gradually removing gas from the galaxy's disk. Radio observations have revealed that the hydrogen gas distribution is asymmetric and truncated on the leading edge of the galaxy's motion through the cluster, consistent with this stripping process. This gas removal will eventually quench star formation and transform M88 into a redder, more quiescent galaxy. The galaxy possesses a mildly active Seyfert 2 nucleus. In amateur telescopes, M88 appears as a bright, elongated oval with a pronounced central brightening. An 8-inch telescope under dark skies can begin to reveal hints of the spiral arm structure, and the galaxy responds beautifully to long-exposure astrophotography.

M88 spans approximately 130,000 light-years in diameter at a distance of about 47 million light-years, seen at a 64-degree inclination.