Since its launch is 1990, the Hubble Space Telescope has provided scientists with a vast amount of quality data and has contributed to a number of important discoveries. One of the best-known images — the Hubble Deep Field — shows some of the earliest and faintest galaxies ever seen. In this video segment adapted from the Space Telescope Science Institute, learn how the Hubble Space Telescope created this amazing picture of the early universe.
© 2014 PBS & WGBH Educational Foundation. All rights reserved.