NASA Spacecraft Lands on Mars

The Phoenix has landed on Mars -- much to the relief of worried flight controllers 170 million miles away at NASA's Jet Propulsion Lab in California, who were helpless to do anything if Phoenix ran into trouble. It was a tense time while flight controllers waited for a signal from Phoenix. Radio signals even traveling at the speed of light take 15 minutes to get from Mars to Earth. Phoenix survived a harrowing 12,700 mph descent to the icy north pole of the planet. The landing zone chosen...Full Story
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