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-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.
21 Mar 24
A rapidly growing supermassive black hole, or quasar, located about 3.4 billion light-years from Earth.
15 Jul 20
The deepest X-ray image ever obtained that contains 28 previously misidentified black holes.
24 Oct 19
A collision of four galaxy clusters located about 3 billion light years from Earth.
09 Aug 18
Two separate surveys of "intermediate-mass black holes†that stretch from the nearby Universe to 10.9 billion light years away.
15 Feb 18
The growth of the biggest black holes in the Universe is outrunning the rate of formation of stars in the galaxies they inhabit.
31 May 17
A population of growing black holes over 13 billion light years from Earth.
28 Apr 17
Astronomers used Chandra observations of 13 galaxy clusters to study the properties of dark matter.
30 Mar 17
(CDF-S XT1)
A source located in the Chandra Deep Field-South (CDF-S) that displays extraordinary properties.
05 Jan 17
The deepest X-ray image, containing objects at a distance of nearly 13 billion light years.
14 Oct 16
Six objects ranging in location from about 20,000 to nearly 3 billion light years away.
30 Aug 16
(Cosmos Cluster)
A galaxy cluster located about 11.1 billion light years from Earth.
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
(PKS 2155-304)
This artist's conception depicts a huge cloud of hot gas 800 million light years from Earth.
13 Mar 01
This image shows that gigantic black holes were much more active in the past than the present.
13 Mar 01
A view of one of the most intensively studied patches of the night sky.
Revised: March 21, 2024