The last object in the Messier catalog is an
elliptical galaxy in the constellation of Andromeda. It is the
second, brighter of the two satellite galaxies of M31, the
Andromeda galaxy. All three of these galaxies are members of the
local group. M110 was discovered by Messier in 1783 when he
discovered M31, but it was not included in his catalog at the
time. It is located about 2.9 million light-years from Earth. At
magnitude 8.0, it can easily be found with binoculars. It is an
impressive sight in a 4-inch or larger telescope.
