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Homework Help: Planet distance

  1. Dec 4, 2005 #1
    I need to find what the distance between earth and saturn would be if they were both in a straight line with the sun (both on the same side of the sun).

    The problem I'm trying to solve involves the doppler effect, and I can work it out if I know that distance. Does anyone know what it is, or where I could look to find out?
  2. jcsd
  3. Dec 4, 2005 #2


    User Avatar

    Google/Wikipedia is your friend.

    Earth's semi-major axis is 1AU and Saturn's semi-major axis is 9.54AU.

    So if they were inline on the same side of the Sun, they would be 8.54AU apart, where 1AU is ~1.5E8km.
  4. Dec 4, 2005 #3
    Thanks :smile:
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