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Even before all the talk of Martian microfossils, the Red Planet was a hot target for NASA, with as many as 10 unmanned missions tentatively scheduled during the next 10 years. After the buzz created by last week's foot-high LIFE ON MARS! headlines, all those missions suddenly look...
In general, trans-Martian travel is possible for only six to eight weeks every 25 months; it is then that Mars' and Earth's orbital pas de deux around the sun brings the two planets close enough to make the trip practical. The next window opens this fall, and NASA...
A month or so after Global Surveyor is launched, a sister ship, the Mars Pathfinder, will follow it into space. Like NASA's unmanned Viking ships of the 1970s, Pathfinder will land on Mars' pockmarked surface. Unlike the Vikings, Pathfinder will have someplace to go once it gets there. After...
"Sure, if we got lucky, dug into the soil and came up with a little plant, we could detect that," says Norm Haynes, director of the Mars Exploration Program at the Jet Propulsion Laboratory in Pasadena, California. "But there's nothing we can send from Earth that can even begin...
To conduct experiments that subtle, it may be necessary not just to send a spacecraft to Mars but to bring a bit of Mars back to Earth. "It's always been clear that we're aiming for a sample-return mission," says Haynes. "A recent study projects one around 2005...