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A spiral galaxy is a type of galaxy characterized by a central bulge of old Population II stars surrounded by a rotating disc of younger Population I stars. A spiral galaxy maintains its spiral arms due to density wave theory.
62.82 kiloparsecs (205,000 light-years) D 25 isophote: Disrupted spiral-like galaxy, possible jellyfish galaxy. [citation needed] Largest lenticular galaxy ESO 248-6: Eridanus: 530.62 kiloparsecs (1,731,000 light-years) 90% total B-light Central galaxy of Abell 3112. [citation needed] Largest starburst galaxy Abell 2125 BCG: Ursa Minor
Milky Way Galaxy's spiral arms and barred core – based on WISE data. The Milky Way was once considered an ordinary spiral galaxy. Astronomers first began to suspect that the Milky Way is a barred spiral galaxy in the 1960s.
2005 – Spitzer Space Telescope data confirm what had been considered likely since the early 1990s from radio telescope data, i.e., that the Milky Way Galaxy is a barred spiral galaxy. [14] [15] 2012 – Astronomers report the discovery of the most distant dwarf galaxy yet found, approximately 10 billion light-years away. [16]
It is the largest known spiral galaxy with the isophotal diameter of over 717,000 light-years (220 kiloparsecs). [ 1 ] This is a list of largest galaxies known, sorted by order of increasing major axis diameters.
This is a list of known galaxies within 3.8 megaparsecs (12.4 million light-years) of the Solar System, in ascending order of heliocentric distance, or the distance to the Sun. This encompasses about 50 major Local Group galaxies, and some that are members of neighboring galaxy groups , the M81 Group and the Centaurus A/M83 Group , and some ...
An example of a spiral galaxy (Pinwheel Galaxy). This category contains galaxies in the S (de Vaucouleurs for indeterminate) category or any galaxy where it is indeterminate whether the galaxy is SA, SB or SAB in its spiral nature. SA, S (Hubble) galaxies should be categorized under Category:Unbarred spiral galaxies
Messier 83 or M83, also known as the Southern Pinwheel Galaxy and NGC 5236, is a barred spiral galaxy [7] approximately 15 million light-years away in the constellation borders of Hydra and Centaurus. Nicolas-Louis de Lacaille discovered M83 on 17 February 1752 at the Cape of Good Hope. [8]