I Zwicky 18 [SEP] constellation
I Zwicky 18
I Zwicky 18 is a dwarf irregular galaxy located about 59 million light years away in the constellation Ursa Major. The galaxy was first identified by Swiss astronomer Fritz Zwicky in a 1930s photographic survey of galaxies.
Age.
Studies at the Palomar Observatory some 40 years ago led astronomers to believe that the galaxy erupted with star formation billions of years after its galactic neighbors. Galaxies resembling I Zwicky 18's youthful appearance are typically found only in the early universe. Early observations with the Hubble Space Telescope suggested
low-mass dwarf galaxy.
- The Wolf-Lundmark-Melotte galaxy is an irregular galaxy on the outer edges of the Local Group. It is in the constellation Cetus.
- I Zwicky 18 is a dwarf irregular galaxy.
See also.
- Lists of astronomical objects
- List of galaxies