I Zwicky 18

I Zwicky 18
I Zwicky 18 observed by the Hubble Telescope
Observation data (J2000 [1] epoch)
Right ascension	09h 34m 02.0s[1]
Declination	55° 14′ 28″[1]
Redshift	751±2 km/s
Distance	0.059 Gly
Characteristics
Type	Irr [2]
Notable features	Very young galaxy [2][3]
Other designations
UGCA 166, SBS 930+554, KUG 930+554, AGC 190351, HFE2003 PSX-01, CBB2012 79
See also: Galaxy, List of galaxies

The I Zwicky 18 is an irregular dwarf galaxy. It is 45 million years light from Earth in the constellation of the Ursa Major. It was identified by first time in the 1930s by the astronomer Fritz Zwicky.

I Zwicky 18, only 500 million years of age, is a recently born galaxy compared with most.^[3] It is still making population III stars, almost entirely made of hydrogen and helium. The Milky Way is about 12,000 million years old.

• List of galaxies

• NASA/IPAC Extraglactic Database
• I Zwicky 18 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images