Sept. 9, 1999
Circumstantial evidence for water on Europa continues to mount as JPL scientists try an ingenious experiment to find hexagonal water-ice crystals on the frigid surface of Jupiter's 4th moon.
Sept. 7, 1999
A NASA scientist has created a new model of the plasmasphere surrounding our world, building on the work of previous models. Earth's complicated plasma environment directly affects our life on Earth - from radio transmissions and power grids to satellite safety.
Sept. 3, 1999
Lunar Prospector failed to kick up a visible dust cloud when it crashed into the Moon, but researchers are still sifting through their data for elusive signatures of water.
Sept. 2, 1999
Scientists continue to ponder one of our star's most closely guarded secrets - why does the solar corona get hotter farther from the Sun's surface?
Sept. 1, 1999
El Nino gets blamed -- rightly or wrongly -- for everything strange in the weather. One NASA scientist has found a relationship: El Nino apparently is related to a reduction in Atlantic hurricane severity.
Aug. 31, 1999
A series of major solar flares and a coronal mass ejection this past weekend could trigger geomagnetic storms and auroral displays visible at high latitudes.
Aug. 30, 1999
A century-old radiation detection tool may be pressed into service to see if neutrinos change flavor. The answer may change our models of subatomic particles and the universe.
Aug. 27, 1999
NASA has released new high resolution pictures of Jupiter's volcanic moon captured during Galileo's closest flyby since 1995.
Aug. 26, 1999
When the Chandra X-ray Observatorytook its "first light" image, it wasn't looking at just another star shining in the darkness. It was watching a foundry distribute its wares to the rest of the galaxy.
Aug. 25, 1999
Mars Polar Lander heads for a touch down near the Red Planet's south pole to study the history of martian climate.