-The sky as observed in X-rays is not dark, but gives off a glow thought to be from many distant sources. Deep surveys with the Chandra X-ray Observatory should reveal the cause of this glow.
15 Jun 11
A composite image combines the deepest X-ray image with optical and infrared data.
30 Aug 10
A composite image of the northern part of Abell 1758, located about 3.2 billion light years from Earth.
25 Oct 07
A compilation of long observations on the same patch of sky.
12 Mar 07
This panorama is the largest contiguous field ever obtained by the Chandra X-ray Observatory.
23 May 05
X-rays from iron atoms near supermassive black holes in the Chandra Deep Fields.
01 Jun 04
Supermassive black hole in a young galaxy billions of light years from Earth.
01 Jun 04
Supermassive black hole in a young galaxy billions of light years from Earth.
19 Jun 03
The Chandra Deep Fields cover two separate regions in the North and South.
19 Jun 03
The Chandra Deep Fields cover two separate regions in the North and South.
31 Jul 02
This artist's conception depicts a huge cloud of hot gas 800 million light years from Earth.
13 Mar 01
A view of one of the most intensively studied patches of the night sky.
13 Mar 01
This image shows that gigantic black holes were much more active in the past than the present.
Revised: June 15, 2011