July 8, 1999
A new method for making high-energy x-ray optics may open the door for a new era of astrophysical observations.
July 2, 1999
Weather researchers and forecasters meet to discuss closer ties to improve "nowcasts" - or forecasts of what the weather will do in the next few hours.
July 1, 1999
NASA and the Hubble Space Telescope Institute have released new images of Mars to commemorate the landing of Mars Pathfinder on July 4, 1997.
June 30, 1999
What's happening to the small craters on Callisto? That's the mystery scientists were contemplating as Galileo zoomed past Jupiter's pockmarked moon this morning in an orbit-changing maneuver designed to bring the spacecraft closer to volcanic Io.
June 29, 1999
A team of sled dogs has braved spring storms and wily marmots to recover microbes from a California mountain top. Yeast samples exposed to extreme conditions near the White Mountain summit will be distributed to classrooms as part of NASA's Life on the Edge education initiative.
June 28, 1999
Earth may be headed into two meteoroid swarms that could produce shooting stars for the next week. Radio observations reported yesterday indicate that meteor activity may already be underway.
June 24, 1999
En route to Saturn, Cassini flew less than 400 miles above Venus today, gaining a boost in speed from that planet's gravity.
June 23, 1999
An ingenious new technique for viewing the previously hidden side of the Sun could improve Space Weatherforecasting.
June 22, 1999
Read a charming, first-hand account of the meteor shower that marked the discovery of the Leonids and created a new branch of astronomy.
June 22, 1999
Experts make their predictions for the 1999 Leonid meteor shower.