Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. So for example, if you tip the scale at a hefty 200 pounds on Earth you'd be a 75 pound featherweight on Mars . The low martian gravity will be good for NASA's Mars Pathfinder spacecraft scheduled to land on Mars next Friday, July 4th . Using rockets, parachutes, and airbags , Mars Pathfinder will be the first spacecraft to touchdown on the planet since the Viking landers in 1976.
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