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The Milky Way [c] is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.
The Galactic Center, as seen by one of the 2MASS infrared telescopes, is located in the bright upper left portion of the image. Marked location of the Galactic Center A starchart of the night sky towards the Galactic Center. The Galactic Center is the barycenter of the Milky Way and a corresponding point on the rotational axis of the galaxy.
The Local Group is the galaxy group that includes the Milky Way, where Earth is located. It has a total diameter of roughly 3 megaparsecs (10 million light-years ; 9 × 10 19 kilometres ), [ 1 ] and a total mass of the order of 2 × 10 12 solar masses (4 × 10 42 kg). [ 2 ]
The Local Group is located on the outer edge of the Virgo Supercluster. [42] [43] Laniakea Supercluster: 160 Mpc 4.94×10 21: A group connected with the superclusters of which the Local Group is a part. Comprises roughly 300 to 500 galaxy groups and clusters, centred on the Great Attractor in the Hydra–Centaurus Supercluster. [44] [45] [46] [47]
Our own galaxy, the Milky Way, is a large disk-shaped barred-spiral galaxy [92] about 30 kiloparsecs in diameter and a kiloparsec thick. It contains about two hundred billion (2×10 11) [93] stars and has a total mass of about six hundred billion (6×10 11) times the mass of the Sun. [94]
Abell 370, a galaxy cluster located nearly 4 billion light-years away from Earth features several arcs of light, including the "Dragon Arc" (lower left of center).
Most distant (difficult) naked eye object. Closest unbarred spiral galaxy to us and third largest galaxy in the Local Group. 61,100 ly 96 Andromeda XXI [66] dSph [53] 2.802 0.859 −9.9 Local Group: Satellite of Andromeda 97 Tucana Dwarf: dE5 2.87 0.88 [7] −9.16 15.7 [1] Local Group [7] Isolated group member — a 'primordial' galaxy [67] 98 ...
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