NASA Image Of The Day

Fifteen Years of NASA's Chandra X-ray Observatory
NASA Image Of The Day
This Chandra X-ray Observatory image of the Hydra A galaxy cluster was taken on Oct. 30, 1999, with the Advanced CCD Imaging Spectrometer (ACIS) in an observation that lasted about six hours. Hydra A is a galaxy cluster that is 840 million light years from Earth. The cluster gets its name from the strong radio source, Hydra A, that originates in a galaxy near the center of the cluster. Optical observations show a few hundred galaxies in the cluster. Chandra X-ray observations reveal a large cloud of hot gas that extends throughout the cluster. The gas cloud is several million light years across and has a temperature of about 40 million degrees in the outer parts decreasing to about 35 million degrees in the inner region. NASA's Chandra X-ray Observatory was launched into space fifteen years ago aboard the Space Shuttle Columbia. Since its deployment on July 23, 1999, Chandra has helped revolutionize our understanding of the universe through its unrivaled X-ray vision. Chandra, one of NASA's current "Great Observatories," along with the Hubble Space Telescope and Spitzer Space Telescope, is specially designed to detect X-ray emission from hot and energetic regions of the universe. Image Credit: NASA/CXC/SAO...
30 Oct 2014
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1 Expedition 41 - Space Station Live - October 30 Administrator 45
2 Expedition 41 - Space Station Live - October 29 Administrator 63
3 Expedition 41 - Progress M-25M/57 Docking Administrator 121
4 Expedition 41 - Progress M-25M/57 Launch Administrator 122
5 NASA News Conference on Orbital Mishap Administrator 253
6 Orbital Sciences/Cygnus CRS-3 Launch Administrator 498
7 Expedition 41 - Space Station Live - October 28 Administrator 41
8 Video B-Roll of Orbital Sciences/Cygnus CRS-3 Processing Administrator 117
9 Expedition 41 - Space Station Live - October 27 Administrator 43
10 Expedition 41 - Progress M-24M/56 Undocking Administrator 77
11 Orbital CRS-3 Mission Science Cargo Overview Briefing Administrator 106
12 Orbital CRS-3 Prelaunch News Conference Administrator 99
13 SpaceX/Dragon CRS-4 - Release from the ISS Administrator 165
14 Expedition 41 - Space Station Live - October 24 Administrator 43
15 "Vital Signs: Taking the Pulse of Our Planet" at the Smithsonian's National Air and Space Museum Administrator 83
16 Expedition 41 - Space Station Live - October 23 Administrator 91
17 Expedition 41 - Russian spacewalk 40 - October 22 Administrator 204
18 Expedition 41 - Space Station Live - October 21 Administrator 104
19 Expedition 41 - Space Station Live - October 20 Administrator 110
20 Expedition 41 - Space Station Live - October 17 Administrator 131
21 Expedition 41 - Space Station Live - October 16 Administrator 118
22 Expedition-41 - US Spacewalk (EVA-28) - October 15 Administrator 292
23 Expedition 41 - Space Station Live - October 14 Administrator 136
24 NASA Science Briefing - Comet Siding Spring Administrator 196
25 Expedition 41 - Space Station Live - October 10 Administrator 137
26 Expedition 41 - Space Station Live - October 9 Administrator 141
27 NASA Teleconference - NuSTAR Discovery Administrator 200
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29 Expedition-41 - US Spacewalk (EVA-27) - October 7 Administrator 433
30 Expedition 41 - Space Station Live - October 6 Administrator 134
31 Expedition 41 - U.S. Spacewalk Overview 28 Administrator 256
32 Expedition 41 - U.S. Spacewalk Overview 27 Administrator 264
33 Expedition 41 - U.S. Spacewalk Briefing 27/28 Administrator 271
34 Expedition 41 - Space Station Live - October 3 Administrator 185
35 Expedition 41 - Space Station Live - October 2 Administrator 189
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37 Expedition 41 - Space Station Live - September 30 Administrator 203
38 Expedition 41 - Space Station Live - September 29 Administrator 196
39 Expedition 41 - Space Station Live - September 26 Administrator 208
40 Expedition 41/42 Soyuz TMA-14M - Hatch Opening and Other Activities Administrator 429
41 Expedition 41/42 Soyuz TMA-14M - Docking Administrator 347
42 Expedition 41/42 Soyuz TMA-14M - Launch Replays Administrator 226
43 Expedition 41/42 Soyuz TMA-14M - Launch Administrator 239
44 Expedition 41/42 Soyuz TMA-14M - Pre-launch Activities Administrator 184
45 Expedition 41 - Space Station Live - September 25 Administrator 278
46 Expedition 41/42 - Pre-Launch Crew News Conference in Baikonur, Kazakhstan Administrator 254
47 Expedition 41 - Space Station Live - September 24 Administrator 254
48 Expedition 41/42 - Soyuz TMA-14M Spacecraft Rollout to the Launch Pad at the Baikonur Cosmodrome in Kazakhstan Administrator 190
49 Expedition 41 - Space Station Live - September 23 Administrator 96
50 Expedition 41/42 - Crew Activities and Soyuz TMA-14M Spacecraft Encapsulation at the Baikonur Cosmodrome Administrator 128
 
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