| 19 Dec 03 |  | N63A | Supernova remnant N63A, located in the nearby galaxy of the Large Magellanic Cloud. |
| 08 Dec 03 |  | NGC 4261 | Elliptical galaxy NGC 4261 reveals dozens of black holes and neutron stars. |
| 17 Nov 03 |  | GB1508+5714 | The quasar GB1508+5714 reveals a jet of high-energy particles. |
| 28 Oct 03 |  | NGC 1637 | A series of Chandra observations of the spiral galaxy NGC 1637. |
| 14 Oct 03 |  | Crescent Nebula
(NGC 6888) | This composite image reveals dramatic details of a portion of the Crescent Nebula. |
| 01 Oct 03 |  | M86
(NGC 4406) | Image of M86 shows gas being swept out of the galaxy to form a long tail more than 200,000 light years in length. |
| 17 Sep 03 |  | Cygnus X-1 | Telltale X-rays from iron may reveal if black holes are spinning or not. |
| 17 Sep 03 |  | GX 339-4 | Telltale X-rays from iron may reveal if black holes are spinning or not. |
| 16 Sep 03 |  | The Moon | Observations of the bright portion of the Moon detected X-rays. |
| 11 Sep 03 |  | XRF 020427 | X-ray flashes (XRFs) that originate from blue star forming galaxies. |
| 11 Sep 03 |  | XRF 011030 | X-ray flashes (XRFs) that originate from blue star forming galaxies. |
| 03 Sep 03 |  | NGC 4438 & NGC 4435 | Two galaxies in the Virgo galaxy cluster that are more than 100,000 light years apart. |
| 01 Sep 03 |  | Perseus Cluster | A 53-hour Chandra observation of the central region of the Perseus galaxy cluster. |
| 14 Aug 03 |  | M17 | A young star cluster 5,000 light years from Earth in the constellation Sagittarius. |
| 30 Jul 03 |  | NGC 6266 | A globular cluster about a hundred light years in diameter. |
| 30 Jul 03 |  | NGC 7099 | A globular cluster about a hundred light years in diameter. |
| 30 Jul 03 |  | 47 Tucanae | Chandra observations of this globular cluster provide a crucial clue to the origin of so-called X-ray binary sources. |
| 30 Jul 03 |  | NGC 6752 | Chandra observations of this globular cluster provide a crucial clue to the origin of so-called X-ray binary sources. |
| 30 Jul 03 |  | NGC 6366 | Chandra observations of this globular cluster provide a crucial clue to the origin of so-called X-ray binary sources. |
| 09 Jul 03 |  | NGC 1068 | An active galaxy approximately 50 million light years from Earth. |
| 30 Jun 03 |  | Vela Pulsar Jet | A jet of high-energy particles associated with the Vela pulsar about 1000 light years from Earth. |
| 19 Jun 03 |  | GOODS Chandra Deep Field-North | The Chandra Deep Fields cover two separate regions in the North and South. |
| 19 Jun 03 |  | GOODS Chandra Deep Field-South | The Chandra Deep Fields cover two separate regions in the North and South. |
| 11 Jun 03 |  | Abell 2029 | Galaxy cluster Abell 2029 is approximately one billion light years from Earth. |
| 27 May 03 |  | NGC 4485 & NGC 4490 | Two galaxies categorized as Ultra-Luminous X-ray sources (ULXs). |
| 26 May 03 |  | TW Hydrae | A young star system in the TW Hydrae Association about 180 light years from Earth. |
| 26 May 03 |  | HD 98800A | A young star system in the TW Hydrae Association about 180 light years from Earth. |
| 26 May 03 |  | SNR 0103-72.6 | A supernova remnant in the Small Magellanic Cloud, a galaxy about 190,000 light years from Earth. |
| 21 May 03 |  | 4C41.17 | One of two massive galaxies that are enveloped by vast clouds of high-energy particles. |
| 21 May 03 |  | 3C294 | One of two massive galaxies that are enveloped by vast clouds of high-energy particles. |
| 08 May 03 |  | Stephan's Quintet | A compact group of galaxies about 280 million light years from Earth. |
| 23 Apr 03 |  | Centaurus A Jet | A powerful jet in an active galaxy located about 11 million light years from Earth. |
| 14 Apr 03 |  | TWA 5B | A brown dwarf orbiting a young binary star. |
| 27 Mar 03 |  | APM 08279+5255 | High-speed winds blowing gas away from a supermassive black hole. |
| 25 Mar 03 |  | Lockman Hole North-West | Chandra Sees Shape of Universe During Formative, Adolescent Years |
| 24 Mar 03 |  | GRB 020813 | A Gamma-Ray Burst about 8,600,000 light years from Earth. |
| 12 Mar 03 |  | DEM L71 | The remains of a supernova explosion that destroyed a white dwarf star. |
| 27 Feb 03 |  | B1957+20
(Black Widow Pulsar) | A pulsar located about 5,000 light years from Earth. |
| 19 Feb 03 |  | NGC 3079 | A spiral galaxy about 55 million light years from Earth. |
| 12 Feb 03 |  | NGC 346 | A hot gas cloud in a star cluster about 180,000 light years from Earth located in the Small Magellanic Cloud. |
| 22 Jan 03 |  | M83 | A spiral galaxy 12 million light years from Earth in the constellation Hydra. |
| 06 Jan 03 |  | Sagittarius A* | This image of Sgr A* was made from the longest X-ray exposure of that region to date. |
