Feb. 17, 1999
Recent discoveries of Pluto-like objects in the outer solar system have sparked debate about the nature of the tiniest "planet."
Feb. 16, 1999
A unique camera that will take some of the first pictures of Earth's invisible magnetic shield is being prepared for flight.
Feb. 12, 1999
NASA's next Great Observatory, the Chandra x-ray telescope, moved one step closer to launch this week after being installed in a clean room for final tests and other work at the Kennedy Space Center.
Feb. 10, 1999
Astronomers have released a new Hubble photograph of a gamma-ray burst's fading optical counterpart. The relic fireball appears to be embedded in a faint, irregular galaxy.
Feb. 9, 1999
Tests prove approach for a new gamma-ray telescope. The design will compete against others in Washington today.
Feb. 9, 1999
Dramatic new Hubble images show vast stellar disks where planets are born.
Feb. 5, 1999
Aerogel will take its next ride into space on Stardust, launching this weekend. With aerogel, scientists hope to capture dust samples from comet Wild and return them to Earth. However, aerogel has many more applications, from super insulation to computing.
Feb. 4, 1999
The Stardust spacecraft is poised to blast off on a rendezvous with a comet - and set to bring back pieces of the comet's coma to Earth.
Feb. 2, 1999
The Galileo spacecraft executed a close flyby of Jupiter's moon Europa this weekend. Recent images strengthen the evidence for a liquid ocean beneath Europa's frozen crust and reveal new surface features in 3D.
Jan. 29, 1999
With new discoveries coming at an ever-quickening pace, scientists review the history of this new branch of Astrophysicsand its implications for understanding our universe.