NGC 772
Encyclopedia
NGC 772 is an unbarred spiral galaxy
approximately 130 million
light-year
s away in the constellation
Aries
. It is notable for possessing a single elongated outer spiral arm, which has likely arisen due to tidal interactions with nearby galaxies. At around 100,000 light years in diameter, NGC 772 rivals the Milky Way Galaxy in size and is surrounded by several satellite galaxies
including the dwarf elliptical
, NGC 770. Two supernova
e (SN 2003 hl & SN 2003 iq) have been observed in NGC 772.
It probably has a H II nucleus, however it may be a transitional object.
Unbarred spiral galaxy
An unbarred spiral galaxy is a type of spiral galaxy without a central bar, or one that is not a barred spiral galaxy. It is designated with an SA in the galaxy morphological classification scheme.The Sombrero Galaxy is an unbarred spiral galaxy....
approximately 130 million
1 E24 m
To help compare different orders of magnitude, this page lists distances starting at 1 Ym .Distances shorter than 10 Ym* 1.2 Ym — 127 million light years — Distance to the closest observed gamma ray burst GRB 980425...
light-year
Light-year
A light-year, also light year or lightyear is a unit of length, equal to just under 10 trillion kilometres...
s away in the constellation
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
Aries
Aries (constellation)
Aries is one of the constellations of the zodiac, located between Pisces to the west and Taurus to the east. Its name is Latin for ram, and its symbol is , representing a ram's horns...
. It is notable for possessing a single elongated outer spiral arm, which has likely arisen due to tidal interactions with nearby galaxies. At around 100,000 light years in diameter, NGC 772 rivals the Milky Way Galaxy in size and is surrounded by several satellite galaxies
Satellite galaxy
A satellite galaxy orbits a larger galaxy due to gravitational attraction. Although a galaxy is made of a large number of objects which are not connected to each other, it has a center of mass, which represents a weighted average of the positions of each component object...
including the dwarf elliptical
Elliptical galaxy
An elliptical galaxy is a galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless brightness profile. They range in shape from nearly spherical to highly flat and in size from hundreds of millions to over one trillion stars...
, NGC 770. Two supernova
Supernova
A supernova is a stellar explosion that is more energetic than a nova. It is pronounced with the plural supernovae or supernovas. Supernovae are extremely luminous and cause a burst of radiation that often briefly outshines an entire galaxy, before fading from view over several weeks or months...
e (SN 2003 hl & SN 2003 iq) have been observed in NGC 772.
It probably has a H II nucleus, however it may be a transitional object.