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The
Great Spiral Galaxy in Andromeda is seen nearly edge-on,
13 degrees to our line of sight.
Known
as NGC 224 and M31, it contains 300 billion solar
masses.
That
makes its larger in size but smaller in mass that
our galaxy the Milky Way (MW). M31 and the MW are
closing at 300 kps (185 miles-per-second) and may
either collide in the far distant future or orbit
each other.
M-31 is 2.3 million light-years (LY) away and 180,000
LY wide.
The
MW is 100,000 LY wide.
Two
of M-31's dwarf, satellite galaxies can be seen --
M-32/NGC 221 above and M-110/NGC 205 below.
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