I Zwicky 18: A Baby Galaxy in a Grown-Up Universe

NASA/ESA Hubble Space Telescope snapped a view of what may be the youngest galaxy ever seen. This "late bloomer" may not have begun active star formation until about 13 billion years after the Big Bang. Called I Zwicky 18 [below, left], the galaxy may be as young as 500 million years old. This youngster has gone though several sudden bursts of star formation - the first only some 500 million years ago and the latest only 4 million years ago. This galaxy is typical of the kinds of galaxies that inhabited the early universe. The galaxy is classified as a dwarf irregular galaxy and is much smaller than our Milky Way.

Credit:

NASA, ESA, Y. Izotov (Main Astronomical Observatory, Kyiv, UA) and T. Thuan (University of Virginia)

About the Image

NASA press release
NASA caption
Id:opo0435a
Type:Observation
Release date:1 December 2004, 06:01
Size:981 x 961 px

About the Object

Name:I Zw 18
Type:• Local Universe : Galaxy : Type : Irregular
• Local Universe : Galaxy : Size : Dwarf
• X - Galaxies Images/Videos
Distance:60 million light years
Constellation:Ursa Major

Colours & filters

BandWavelengthTelescope
Optical
V
555 nm Hubble Space Telescope
ACS
Infrared
I
814 nm Hubble Space Telescope
ACS

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