The Spitzer Space Telescope website will be down on Tuesday July 29th from 9am PDT to 10am PDT for server maintenance. Thank you for your patience.

Download Image

About the Image

About the Object

Color Mapping

06.01.04

Old and 'Red' Distant Galaxies

This image provides a close-up look at two of the extremely bright infrared galaxies revealed by NASA's Spitzer Space Telescope. While they are very faint (bottom) or even completely invisible (top) in the deepest-ever optical images obtained by NASA's Hubble Space Telescope, Spitzer easily picked them up because of their strong infrared emissions. Astronomers believe these galaxies are particularly "red" because they are very old and appear to go back in time to a period when the universe was only two billion years old.