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  1. Planets, The. Part 2: Mercury and Venus (1985 Video)

    Subject
    Astronomy
    Distribution
    OUT OF DISTRIBUTION, Videocassette. Standard formats. col. 30 min.

    Mercury is the closest planet to the sun. It was not thought to rotate on its own axis so a solar day would equal a year. Shows how modern radar telescope techniques disproved this theory. The Mariner 10...

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