A series of photos taken from space more than 20 years ago revealed thousands of unknown galaxies in a tiny patch of _emptyî space. Called the Hubble Deep Fiel

"Hubble Deep Field and the Distant Universe describes a watershed event in the history of astronomy, in addition to recounting the development of space astronom

The Hubble Deep Field (HDF) is the deepest optical image of the Universe ever obtained. It is the result of a 150-orbit observing programme with the Hubble Spac

A series of photos taken from space more than 20 years ago revealed thousands of unknown galaxies in a tiny patch of "empty" space. Called the Hubble Deep Field

The Hubble Space Telescope (HST) has operated continuously since 1990. During that time, four space shuttle-based service missions were launched, three of which