Spiral galaxy
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Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, form part of the Hubble sequence. Most spiral galaxies consist of a
An example of a spiral galaxy, Messier 77 (also known as NGC 1068)
Tuning-fork-style diagram of the Hubble sequence
Barred spiral galaxy UGC 12158
NGC 1300 in infrared light
Milky Way
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The Milky Way or Milky Way Galaxy, or simply the Galaxy, 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 nig
Spiral galaxy
…roughly a quarter 2.5 billion years ago, until present, where over two-thirds of the galaxies in the visible universe (Hubble volume) have bars. The Milky Way is a barred spiral, although the bar itself is difficult to observe from Earth's current position within the galactic disc. The most convincing evidence…
The Galactic Center as seen from Earth's night sky (featuring the telescope's laser guide star).
The Milky Way as seen from a dark site with little light pollution
Photograph of the "Great Andromeda Nebula" from 1899, later identified as the Andromeda Galaxy
A diagram of the Sun's location in the Milky Way; the angles represent longitudes in the galactic coordinate system