Going, Going, Almost Gone

These three pictures illustrate how a nearby irregular galaxy brimming with star birth would appear at successively greater distances from Earth.

The pictures illustrate that less of the galaxy is seen at successively greater distances from Earth because the fainter stars are no longer visible.

This simulation demonstrates that astronomers may be missing most of the starlight from the farthest galaxies because it's too faint to see, even with the most powerful telescopes. The star birth they are detecting is just the 'tip of the iceberg.'


Original: D. Hunter (Lowell Observ.) and A. Aloisi (JHU), Simulations: A. Fruchter and Z. Levay (STScI)

About the Image

NASA press release
NASA caption
Release date:8 January 2002, 20:00
Size:720 x 468 px

About the Object

Name:I Zw 18
Type:Local Universe : Galaxy : Type : Irregular
Local Universe : Galaxy : Size : Dwarf
Distance:300 million light years

Image Formats

Large JPEG
37.1 KB
Screensize JPEG
73.9 KB

Colours & filters

Optical Hubble Space Telescope

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