| Date | PI | Objects | Title |
|---|---|---|---|
| 14 Dec 04 | Slane | 3C 58 | Going to Extremes: Pulsar Gives Insight on Ultra-Dense Matter and Magnetic Fields |
| 22 Nov 04 | Schwartz | SDSSp J1306 | Precocious Supermassive Black Holes Challenge Theories |
| 26 Oct 04 | O'Sullivan | NGC 4555 | Chandra's Find of Lonely Halo Raises Questions About Dark Matter |
| 06 Oct 04 | Sankrit | Kepler SNR | NASA's Great Observatories May Unravel 400-Year-Old Supernova Mystery |
| 23 Sept 04 | Gaensler | G359.23-0.82 | The Mouse the Soared |
| 08 Sept 04 | Scharf | Fornax Cluster | Motions in Nearby Galaxy Cluster Reveal Presence of Hidden Superstructure |
| 23 Aug 04 | Hwang | Cas A | Deepest Image of Exploded Star Uncovers Bipolar Jets |
| 13 Aug 04 | Wang | Abell 2125 | Chandra Catches Early Phase of Cosmic Assembly |
| 04 Aug 04 | Soderberg | GRB 031203 | Chandra Contributes to ESA's Integral Detection of Closest Gamma-Ray Burst |
| 22 Jul 04 | Kastner | McNeil's Nebula | X-ray Outburst from Young Star in McNeil's Nebula |
| 06 Jul 04 | Chartas | H1413+117 | Chandra Looks Over a Cosmic Four-Leaf Clover |
| 22 Jun 04 | Muno | Galactic Center | Chandra Turns up the Heat in the Milky Way's Center |
| 02 Jun 04 | Keohane | W49B | Smoking Gun Found for Gamma-Ray Burst in Milky Way |
| 01 Jun 04 | Dickinson | GOODS fields | Spitzer Leads NASA's Great Observatories to Uncover Black Holes and Other Hidden Objects in the Distant Universe |
| 18 May 04 | Allen | 26 clusters | Chandra Opens New Line of Investigation on Dark Energy |
| 10 May 04 | Forman | M87 | Giant Galaxy's Violent Past Comes Into Focus |
| 05 Apr 04 | Mori | Titan/Crab | Titan Casts Revealing Shadow |
| 08 Mar 04 | Ness | Saturn | X-rays from Saturn Pose Puzzles |
| 01 Mar 04 | Di Stefano | M101,M83,M51,NGC 4697 | Enigmatic X-ray Sources Point to Possible New Black Hole Population |
| 18 feb 04 | Komossa | RX J1242-11 | Giant Black Hole Rips Apart Star |
| 30 Jan 04 | Drake | V471 Tauri | Star Show it Has the Right Stuff |
| 07 Jan 04 | Fabbiano | The Antennae | Chandra Locates Mother Lode of Planetary Ore in Colliding Galaxies |
| 06 Jan 04 | Keel | C153 | Too Fast, Too Furious: A Galaxy's Fatal Plunge |
| 02 Jan 04 | Rosati | RDCS 1252.9-2927 | A Tale of Two Record-Breaking Galaxy Clusters |