March 16, 1999
NASA/Marshall's Life on the Edge program is barely a month old but it's already producing results in grade school classrooms. Students experimenting with "Planets in a Bottle" are learning about extremophiles and the prospects for life elsewhere in the solar system.
May 21, 1999
Would we know life if we saw it? What is essential to life, and what is just characteristic of life as we know it? Organic compounds seem to be a key, and they are turning out to be more common than was once expected.
Sept. 23, 1999
Today's autumnal equinox heralds the dawn of a new day at the South Pole as Earth joins three other planets in the solar system where it is autumn in the northern hemisphere.
May 12, 1999
Venus and The Moonwill put on a dazzling show for moviegoers May 17 through May 19.
Oct. 26, 1999
A new image of the Centaurus A galaxy shows x-ray jets as long as our whole galaxy is wide. The image helps give new insight into what happens when galaxies collide.
Oct. 22, 1999
A blast of solar wind from the Sun on October 21 is creating strong geomagnetic storm conditions a day later. The Ultraviolet Imager onboard the POLAR spacecraft has captured dramatic images of the storm as seen from Earth orbit.
Dec. 7, 1999
On December 13 and 14, 1999, fragments of the mysterious asteroid 3200 Phaethon will strike Earth's atmosphere and produce a beautiful sky show. The Geminids offer the last chance in 1999 for skywatchers to view a dazzling meteor shower. Follow the action at Geminids.com.
June 18, 1999
From the International Conference on Atmospheric Electricity, scientists review what happens when people and Lightningconverge.
Nov. 14, 1999
By observing the transit of a planet across the face of a distant star, astronomers prove that planets exist outside our solar system. The amount of dimming of the star's light also gives the first-ever estimate of the size and density of an extrasolar planet.
March 29, 1999
A dramatic new time-lapse movie from NASA's Hubble Space Telescope shows for the first time seasonal changes and raging storms on the planet Uranus.