irregular galaxy
21Dwarf spiral galaxy — A dwarf spiral galaxy is the dwarf version of a spiral galaxy. Dwarf galaxies are characterized as having low luminosities, small diameters (less than 5 kpc), low surface brightnesses, and low hydrogen masses.[1] The galaxies may be considered a… …
22Spiral galaxy — A spiral galaxy is a galaxy belonging to one of the three main classes of galaxy originally described by Edwin Hubble in his 1936 work “The Realm of the Nebulae” [cite book |last=Hubble |first=E. P. |authorlink=Edwin Hubble |title=The Realm of… …
23Dwarf elliptical galaxy — Dwarf elliptical galaxies, or dEs, are elliptical galaxies that are much smaller than others. They are classified as dE, and are quite common in galaxy groups and clusters, and are usually companions to other galaxies. Contents 1 Examples 2… …
24Starburst galaxy — A starburst galaxy is a galaxy in the process of an exceptionally high rate of star formation, compared to the usual star formation rate seen in most galaxies. Galaxies are often observed to have a burst of star formation after a collision or… …
25Pegasus Dwarf Spheroidal Galaxy — Infobox Galaxy name = Pegasus Dwarf Spheroidal Galaxy caption = type = dSphcite journal author=Karachentsev, I. D.; Kashibadze, O. G. title=Masses of the local group and of the M81 group estimated from distortions in the local velocity field… …
26Peculiar galaxy — A peculiar galaxy is a galaxy which is unusual in its size, shape, or composition. Peculiar galaxies come about as a result of interactions between galaxies, and they may contain atypical amounts of dust or gas, may have higher or lower surface… …
27Dark galaxy — A dark galaxy is a hypothetical galaxy composed of dark matter.[1] Dark galaxies receive their name because they have no detectable stars and are theoretically invisible. An influential community of scientists conjecture the existence of dark… …
28Canis Major Dwarf Galaxy — Infobox Galaxy name = Canis Major Dwarf epoch = J2000 type = Irr ra = RA|07|12|35.0cite web title=NASA/IPAC Extragalactic Database work=Results for Canis Major Dwarf url=http://nedwww.ipac.caltech.edu/cgi bin/nph… …
29Sagittarius Dwarf Elliptical Galaxy — Infobox Galaxy caption = name = Sagittarius Dwarf Elliptical Galaxycite web title=SIMBAD Astronomical Database work=Results for Sagittarius Dwarf Spheroidal url=http://simbad.u strasbg.fr/Simbad accessdate=2006 11 28 ] epoch = J2000 type =… …
30Low surface brightness galaxy — A low surface brightness galaxy or LSB galaxy is a diffuse galaxy with a surface brightness that, when viewed from Earth, is at least one magnitude lower than the ambient night sky.Most LSBs are dwarf galaxies, in which most of their baryonic… …
