ROSAT X-ray image of NGC 2516, a cluster
of young stars. (NASA)
ROSAT X-ray image of Cassiopeia A, a
remnant of a star that exploded about 300 years ago.
(NASA)
Artist's rendition of the violent
whirlpool of hot gas and high-energy jets near a supermassive
black hole. (SAO)
Comparison of UK Schmidt optical image
(left) and ROSAT X-ray image (right) of the Coma cluster of
galaxies. The X-ray shows a cloud of hot gas with a temperature
of 90 million degrees Celcius.
The Chandra X-ray Observatory Spacecraft
(NGST)
Portrayal of Space Shuttle Columbia
deploying Chandra (NGST)