irregular galaxy


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irregular galaxy

See galaxies; Hubble classification.

irregular galaxy

[i′reg·yə·lər ′gal·ik·sē]
(astronomy)
A galaxy which shows no definite order or shape, except that of a general flattened appearance.
References in periodicals archive ?
Members include the irregular galaxy NGC 2337, which is 37 million light-years away in Lynx, and the edge-on spiral NGC 2683, which is 31 million light-years from Earth, also in Lynx.
Urbanik, "Regular magnetic fields in the dwarf irregular galaxy NGC 4449," Astronomy & Astrophysics, vol.
It is classified as an irregular galaxy. Through small telescopes M82 appears as an elongated cigar-shaped spindle.
And NASA's Hubble Space Telescope has captured a stunning image of an irregular galaxy that shows signs of having experienced a cosmic "hit-and-run accident."
Galaxies in Lion Territory Object Type Mag(v) Size NGC 2964 Spiral galaxy 11.3 2.9' x 1.6' NGC 2968 Irregular galaxy 11.7 1.9' x 1.3' NGC 2970 Elliptical galaxy 13.6 0.8' x 0.7' NGC 3003 Spiral galaxy 11.9 5.8' x 1.3' NGC 3021 Spiral galaxy 12.1 1.6' x 0.9' NGC 3067 Spiral galaxy 12.1 2.4' x 0.8' NGC 3245 Lenticular galaxy 10.8 2.9' x 1.1' NGC 3277 Spiral galaxy 11.7 1.9' x 1.7' NGC 3254 Spiral galaxy 11.7 4.5' x 1.2' O[SIGMA][SIGMA] 105 Double star 7.0, 8.2 134" NGC 3245A Barred spiral 13.9 3.6' x 0.3' NGC 3158 Elliptical galaxy 11.9 2.0' x 1.8' Object RA Dec.
Venn, "The spatial homogeneity of nebular and stellar oxygen abundances in the Local Group dwarf irregular galaxy NGC 6822," Astrophysical Journal Letters, vol.
Due to their unusual shape, he originally classified them as a single irregular galaxy.
Originally classified as an irregular galaxy, M82 images taken in 2005 in the near infrared revealed two symmetric spiral arms aligned edge-on to our line of sight.
M82, also called the Cigar Galaxy, is a spiral galaxy that was first considered an irregular galaxy. It gets the Cigar name due to its perceived elliptical shape, given its tilt from Earth's point of view.
Using averted vision I can spot the irregular galaxy NGC 4068 in the same field of view, 23' west-southwest of its neighbor, with two faint yet distracting stars to its west.
Some identify NGC 3447B as a former spiral galaxy, while others categorize it as being an irregular galaxy."
Starburst "There are many indications that NCC 1569, a small 11th-magnitude irregular galaxy in Camelopardalis, underwent a tremendously violent burst of star formation millions of years ago.