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? asked in Science & MathematicsAstronomy & Space · 9 years ago

For communication. How long, and how often is Mars behind the Sun as seen from Earth.?

Update:

Satans Claws missed the point or I'm a dick head.

4 Answers

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  • Paula
    Lv 7
    9 years ago
    Favorite Answer

    The others have answered correctly, but failed to mention one point.

    Mars only passes directly behind the sun once in every couple of hundred years or so, and stays hidden for only a day or two.

    But when it is within 5 degrees or so of the sun there would be communication problems, due to the immense solar radiation 'swamping' the communication from Mars. That close approach occurs roughly every two years.

    The communication problem could be reduced by transmitting the signal in a frequency that the sun does not have a high output of energy in.

  • Alan
    Lv 7
    9 years ago

    For about a month every 2 years

    Source(s): 50 years studying astronomy
  • ?
    9 years ago

    mars is 228 million km (142 million miles) distant from sun

  • Satan Claws
    Lv 7
    9 years ago

    About once per martian orbit.

    Source(s): Kepler's third law. Mars-Sun distance in Astronomical Units.
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