Astrophysics (Index)About

I Zwicky 18

(I Zw 18, Zw I 18)
(blue compact galaxy with low metallicity)

I Zwicky 18 (I Zw 18) is a blue compact dwarf galaxy (i.e., with star formation) with very low metallicity. Metallicity is so low that it is presumed to include and form Population III stars. The low metallicity and early stars also made astronomers assume the galaxy was very young, but eventually older stars were discovered.

(galaxy,dwarf galaxy)
Further reading:
/Lookback Years
.004218Mpc59.0MlyI Zwicky 18
Coordinates:I Zw 18

Referenced by pages:
Catalog of Galaxies and Clusters of Galaxies (CGCG)
dwarf galaxy