Back to Glossary
White Dwarf
The dense, hot core left behind after a low- or intermediate-mass star expels its outer layers. White dwarfs are composed mostly of electron-degenerate matter and no longer undergo fusion.
Source: chandra.harvard.edu
APODs including "White Dwarf"
Telescope with Lightning
19/01/1999
Image Credit: AURA / NASA APOD
Telescopes are not very useful during lightning storms. Nevertheless, with lightning illuminating a dark landscape, the picturesque dome of the famous Kitt Peak 2.1-meter Telescope makes for a dramatic photograph. A passing car created the red and yellow streaks visible in the foreground. The 2.1-meter Telescope has participated in many important astronomical discoveries including the discovery of the Lyman-alpha forest, the first gravitational lens, and the first pulsating white dwarf.