| 18 Dec 06 |  | W3 Main | W3 is a region where many massive stars are forming in a string of stellar clusters, located about 6,000 light years from Earth in the Perseus arm of the Milky Way galaxy. |
| 29 Nov 06 |  | N49 | This is a composite image of N49, the brightest supernova remnant in optical light in the Large Magellanic Cloud. |
| 15 Nov 06 |  | Cassiopeia A | A supernova remnant believed to be the remains of a massive star that exploded over 300 years ago. |
| 02 Nov 06 |  | MS 0735.6+7421 | A galaxy cluster located about 2.6 billion light years away in the constellation of Camelopardus. |
| 24 Oct 06 |  | Crab Nebula | A supernova remnant and pulsar located 6000 light years from Earth in the constellation of Taurus. |
| 05 Oct 06 |  | M87 | An elliptical galaxy known in the Virgo cluster about 50 million light years away. |
| 27 Sep 06 |  | NGC 3576 | A giant region of star formation about 9,000 light years from Earth. |
| 18 Sep 06 |  | RCW 86 | A supernova remnant 8,200 light years away. |
| 30 Aug 06 |  | XRF 060218 | A cosmic explosion 470 million light-years away. |
| 21 Aug 06 |  | 1E 0657-56 | Site of a collision between two large galaxy clusters about 3.4 billion light years from Earth. |
| 08 Aug 06 |  | CL 0016+1609 | A galaxy cluster about 4.5 billion light years away. |
| 08 Aug 06 |  | Abell 665 | A galaxy cluster about 2.2 billion light years away. |
| 08 Aug 06 |  | MACS J1149.5+223 | A galaxy cluster about 2.6 billion light years away. |
| 08 Aug 06 |  | CL J1226.9+3332 | A galaxy cluster about 3.5 billion light years away. |
| 08 Aug 06 |  | Abell 1689 | A galaxy cluster about 2.1 billion light years away. |
| 08 Aug 06 |  | Abell 1914 | A galaxy cluster about 1.4 billion light years away. |
| 19 Jul 06 |  | Arches, Quintuplet, and GC Star Clusters | This Chandra X-ray image of the Galactic Center shows three massive star clusters near Sagittarius A*. |
| 03 Jul 06 |  | SNR 0519-69.0 | The remains of a supernova in the nearby Large Magellanic Cloud galaxy. |
| 03 Jul 06 |  | SNR 0509-68.7 | The remains of a supernova in the nearby Large Magellanic Cloud galaxy. |
| 03 Jul 06 |  | SNR 0453-68.5 | The remains of a supernova in the nearby Large Magellanic Cloud galaxy. |
| 03 Jul 06 |  | SNR 0534-69.9 | The remains of a supernova in the nearby Large Magellanic Cloud galaxy. |
| 21 Jun 06 |  | GRO J1655-40 | A binary star system consisting of a black hole and a normal star, located about 11,000 light years from Earth. |
| 20 Jun 06 |  | 3C273 | A quasar over 3 billion light years from Earth. |
| 05 Jun 06 |  | M31
(Andromeda Galaxy) | This color-coded Chandra image shows the central region of the Andromeda Galaxy. |
| 01 Jun 06 |  | J0617 in IC 443 | A neutron star located in a supernova remnant |
| 10 May 06 |  | Mz 3
(Ant Nebula) | A planetary nebula about 3,000 light years from Earth. |
| 10 May 06 |  | BD+30-3639 | A planetary nebula about 5,000 light years from Earth. |
| 10 May 06 |  | NGC 7027 | A planetary nebula about 3,000 light years from Earth. |
| 10 May 06 |  | Hen 3-1475 | A planetary nebula about 18,000 light years from Earth. |
| 24 Apr 06 |  | M82 | A galaxy 12 million light years from Earth that is undergoing a burst of star formation. |
| 24 Apr 06 |  | NGC 4696 | A large elliptical galaxy in the Centaurus Galaxy Cluster |
| 24 Apr 06 |  | NGC 507 | An elliptical galaxy 232 million light years away. |
| 24 Apr 06 |  | NGC 4374
(M84) | An elliptical galaxy 55 million light years away. |
| 24 Apr 06 |  | NGC 4472 | An elliptical galaxy 55 million light years away. |
| 24 Apr 06 |  | NGC 4486 | An elliptical galaxy 55 million light years away. |
| 24 Apr 06 |  | NGC 4552 | An elliptical galaxy 55 million light years away. |
| 24 Apr 06 |  | NGC 4696 | An elliptical galaxy 55 million light years away. |
| 24 Apr 06 |  | NGC 5846 | An elliptical galaxy 146 million light years away. |
| 24 Apr 06 |  | NGC 6166 | An elliptical galaxy 80 million light years away. |
| 06 Apr 06 |  | 3C 75 in Abell 400 | A galaxy cluster with a central galaxy, NGC 1128, that has produced a giant double radio source known as 3C 75. |
| 23 Mar 06 |  | 4C37.43 | An artist's illustration depicts a quasar in the center of a galaxy that has turned on and is expelling gas at high speeds in a galactic superwind. |
| 06 Mar 06 |  | NGC 2841 | This X-ray/optical composite image of the large spiral galaxy NGC 2841 shows multimillion degree gas rising above the disk of stars and cooler gas. |
| 15 Feb 06 |  | Puppis A | A supernova remnant about 7,000 light years from Earth |
| 03 Feb 06 |  | NGC 5746 | A massive spiral galaxy about 100 million light years from Earth. |
| 11 Jan 06 |  | Cartwheel Galaxy | A ring galaxy 400 million light years from Earth. |
| 10 Jan 06 |  | NGC 0507 | An elliptical galaxy 234 million light years away. |
| 10 Jan 06 |  | NGC 5044 | An elliptical galaxy 102 million light years away. |
| 10 Jan 06 |  | NGC 1399 | An elliptical galaxy 65 million light years away. |
| 10 Jan 06 |  | NGC 0533 | An elliptical galaxy 253 million light years away. |
| 10 Jan 06 |  | NGC 7618 | An elliptical galaxy 251 million light years away. |
| 10 Jan 06 |  | NGC 6482 | An elliptical galaxy 192 million light years away. |
