What do you want to know after reading the first part of "Exploring Mars”?
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December 2, 1971 - The USSR's Mars 3 lander makes the first successful landing on the planet's surface. It transmits data for 20 seconds before failing. July and August 1973 - The USSR successfully launches Mars 4, 5, 6 and 7. Each spacecraft takes about seven months to reach the planet's orbit.
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December 2, 1971 - The USSR's Mars 3 lander makes the first successful landing on the planet's surface. It transmits data for 20 seconds before failing. July and August 1973 - The USSR successfully launches Mars 4, 5, 6 and 7. Each spacecraft takes about seven months to reach the planet's orbit.
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