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  1. #1
    PrisNo6's Avatar
    PrisNo6 Guest

    Default Mars - retrograde motion demo low-resolution mpg

    I have dumped a low-quality mpg using Cartes de Ciel that illustrates
    the retrograde motion of Mars between May 2003 and January 2004.
    Although it is far below the quality available on your personal
    desktop planetarium programs, it may be of use in responding to
    non-astro general public questions about the retrograde motion of

    Because of the file-size, I request that you right-click on the link
    and save the file to your desktop, instead of playing the MPG directly
    across my ISP, and clogging the connection.

    The video begins in early May 2003 with Mars in normal motion in
    Capricorn and moving towards Aries. The video continues through the
    beginning of retrograde motion in Aries during mid-July, follows Mars'
    retrograde motion back towards Capricorn through the autumn, tracks
    Mars' resumption of normal motion in late autumn-early winter, and
    ends in the first week in January 2004 with Mars leaving Aries and
    entering Pisces. The horizon line that sweeps downward in May and
    upward in the winter is my local obs horizon at 40 degrees north.

    The field of view in the video is 30 degrees. The point of view is
    tracking Mars, which remains at the center of the frame. The days
    between frames is 4, which is too large to illustrate the several
    close passes that the Moon will make by Mars in the coming months.

    Again, this is low-quality res stuff, but may be a useful reference in
    talking about retrograde motion with your non-astronomy friends and

    Regards - Kurt

  2. #2
    PrisNo6's Avatar
    PrisNo6 Guest

    Default Mars - retrograde motion demo low-resolution mpg (PrisNo6) wrote in message news:< com>...

    Replaced with a more reasonable sized and better resolution gif file:

    Also see Sam Wormley's "Space Weather" retrograde demo posted earlier
    this month, e.g. -

    - Kurt



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