NGC 2997
Encyclopedia
NGC 2997 is a face-on unbarred spiral galaxy
about 40 million light-year
s away in the constellation
Antlia
. It is the brightest galaxy of the NGC 2997 group
of galaxies.
NGC 2997 is particularly notable for a nucleus surrounded by a chain of hot giant clouds of ionized hydrogen. It is featured on the cover of the first edition of Galactic Dynamics by James Binney
and Scott Tremaine
.
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....
about 40 million 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....
Antlia
Antlia
Antlia is a constellation in the southern sky. Its name means "pump" and it specifically represents an air pump. The stars comprising Antlia are faint, and the constellation was not created until the 18th century...
. It is the brightest galaxy of the NGC 2997 group
NGC 2997 Group
The NGC 2997 group is a group of galaxies about 24.8 million light-years from Earth containing NGC 2997 as a member. It is a group in the Local Supercluster along with the Local Group.- References :...
of galaxies.
NGC 2997 is particularly notable for a nucleus surrounded by a chain of hot giant clouds of ionized hydrogen. It is featured on the cover of the first edition of Galactic Dynamics by James Binney
James Binney
James Jeffrey Binney, FRS, FInstP is a British astrophysicist. He is currently a Professor of Physics at the University of Oxford, where he is head of the Sub-Department of Theoretical Physics as well as a Professorial Fellow at Merton College...
and Scott Tremaine
Scott Tremaine
Scott Duncan Tremaine is a Canadian-born astrophysicist. He is a fellow of the Royal Society of London, the Royal Society of Canada and the National Academy of Sciences. Tremaine is widely regarded as one of the world's leading astrophysicists for his contributions to the theory of solar system...
.