Astrophysics (Index)About

Messier 100

(M100, NGC 4321)
(easily observed spiral galaxy)

Messier 100 (M100 or NGC 4321) is a spiral galaxy about 55 million light-years distant that is oriented moderately close to perpendicular to the line of sight, i.e., so the spiral is fully in view. It is classified as a grand design spiral galaxy, showing a very clear spiral structure. A number of supernova have been identified in it. Like Whirlpool Galaxy, its orientation makes it ideal for many observations aimed at discovering the architecture of spiral galaxies such as the frequency, location, and density of molecular clouds.

Further reading:
/Lookback Years
.003917Mpc55.0MlyMessier 100

Referenced by pages:
grand design spiral galaxy
Messier 74 (M74)
spiral galaxy
Virgo Cluster