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Galaxies are seperate star systems like our Milky Way and contain hundreds of millions/billions of stars. The distances to them are incredible and humbling. If distances within our own galaxy are measured in hundreds or thousands of light years (which in and of itself is mind boggling), how about hundreds of millions of light years to some of these? There are probably around 100 billion galaxies in the universe. Big enough neighborhood for you?

Before Edwin Hubble postulated in 1923 that "Spiral Nebulae" were actually separate galaxies at vast distances, they were thought to be structures within our own Milky Way and the Milky Way was our entire Universe.

Galaxies are classified by shape - Spiral (with subtypes), Elliptical, and Irregular.

Galaxies,with the exception of a few like the great Andromeda Galaxy, M31, are small and dim. You are lucky to have one at magnitude 8 or 9 to image, and most are far fainter.

Galaxy Cluster Abell 426 - Perseus Cluster

Galaxy Cluster Abell 426 - Perseus Cluster

IC 342 in Camelopardalis

IC 342 in Camelopardalis

Twin Dwarf Galaxies NGC 185 and NGC 147 in Cassiopeia

Twin Dwarf Galaxies NGC 185 and NGC 147 in Cassiopeia

M33 - The Triangulum Galaxy

M33 - The Triangulum Galaxy

Abell 2151 - The Hercules Galaxy Cluster

Abell 2151 - The Hercules Galaxy Cluster

NGC 5371 in Canes Venatici

NGC 5371 in Canes Venatici

M94 in Canes Venatici

M94 in Canes Venatici

M88 in Coma Berenices

M88 in Coma Berenices

NGC 4535 in Virgo

NGC 4535 in Virgo

NGC 3953 in Ursa Major

NGC 3953 in Ursa Major

M96 in Leo

M96 in Leo

M33 - "The Galaxy in Triangulum"

M33 - "The Galaxy in Triangulum"

NGC 891 in Andromeda

NGC 891 in Andromeda

M74 in Pisces - The "Phantom Galaxy"

M74 in Pisces - The "Phantom Galaxy"

NGC 7331 and the "Deerlick Group"

NGC 7331 and the "Deerlick Group"

M31 in HaRGB - The Great Andromeda Galaxy - 4 Panel Mosaic

M31 in HaRGB - The Great Andromeda Galaxy - 4 Panel Mosaic

M110 in Andromeda

M110 in Andromeda

M32 in Andromeda

M32 in Andromeda

Arp 271 (NGC 5426 and NGC 5427) in Virgo

Arp 271 (NGC 5426 and NGC 5427) in Virgo

Draco Trio

Draco Trio