Planetary Science
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- Planetary Science
Martian leaks: Hints of present-day water
In some of the coldest regions on Mars, water appears to have recently gushed from just beneath the surface, running down crater walls and steep valleys.
- Planetary Science
X rays reveal Eros’ primitive nature
Aided by a blast of X rays from the sun, a spacecraft orbiting the near-Earth asteroid 433 Eros has gathered preliminary evidence that the rock is a primitive relic, apparently unchanged since the birth of the solar system.
- Planetary Science
A Comet’s Long Tail Tickles Ulysses
Stretching more than half a billion kilometers, the ion tail that Comet Hyakutake flaunted when it passed near the sun in 1996 is the longest ever recorded and suggests that otherwise invisible comets could be detected by searching for their tails.
- Planetary Science
Rocks on the ice
Pristine fragments of a meteorite that fell January 18 in the frozen Yukon and that remained frozen until they were delivered to a NASA laboratory may reveal much about the earliest days of the solar system.
- Planetary Science
Reviewers see red over recent Mars programs
NASA's two most recent missions to Mars failed because they were underfunded, managed by inexperienced people, and insufficiently tested, according to a report released March 28.
- Planetary Science
Unveiling Mars’ watery secret
A new gravity map of Mars has revealed a network of buried channels that billions of years ago may have been on the surface and helped carry water to fill an ancient ocean.
- Planetary Science
Meteoric wallop may have diversified life
A new study suggests that the evolutionary burst on Earth some 540 million years ago occurred around the time that cosmic debris began pummeling our planet at an increasing rate.
- Planetary Science
Tryst in space: Craft, asteroid rendezvous
On Valentine's Day, the NEAR spacecraft cozied up to the asteroid 433 Eros, becoming the first craft to orbit a tiny body.
- Planetary Science
Life on Europa: A possible energy source
New evidence supports the notion that Jupiter's moon Europa contains an ocean beneath its icy surface, and a planetary scientist has proposed a novel way that Europa could be getting the energy required to sustain life within that ocean.
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