Check Out This Short Time-Lapse From Cassini

Discussion in 'Techforge' started by Tuckerfan, Jan 6, 2019.

  1. Tuckerfan

    Tuckerfan BMF Staff Member Moderator

    Joined:
    Oct 13, 2007
    Messages:
    21,541
    Location:
    Space the final frontier
    Ratings:
    +26,534
    For scale, the Great Red Spot is over twice the size of the Earth.

    • Agree Agree x 2
    • Thank You! Thank You! x 1
  2. Marso

    Marso High speed, low drag.

    Joined:
    Mar 27, 2004
    Messages:
    27,998
    Location:
    Idaho
    Ratings:
    +12,385
    See, it just never looks like that through my backyard telescope. That's why I sold the mother scratcher in a garage sale. :tos::madcookie:
  3. Tuckerfan

    Tuckerfan BMF Staff Member Moderator

    Joined:
    Oct 13, 2007
    Messages:
    21,541
    Location:
    Space the final frontier
    Ratings:
    +26,534
  4. Marso

    Marso High speed, low drag.

    Joined:
    Mar 27, 2004
    Messages:
    27,998
    Location:
    Idaho
    Ratings:
    +12,385
    Just noticed something not right in that video: the inside moon appears to be orbiting at a slower speed than the outside moon. Should be the other way around.
    • Agree Agree x 1
  5. Lanzman

    Lanzman Vast, Cool and Unsympathetic Formerly Important

    Joined:
    Mar 27, 2004
    Messages:
    29,303
    Location:
    Virginia, USA
    Ratings:
    +26,641
    And I think they mean Juno, not Cassini.
  6. Tuckerfan

    Tuckerfan BMF Staff Member Moderator

    Joined:
    Oct 13, 2007
    Messages:
    21,541
    Location:
    Space the final frontier
    Ratings:
    +26,534
    • Agree Agree x 1
  7. Paladin

    Paladin Overjoyed

    Joined:
    Mar 29, 2004
    Messages:
    43,184
    Location:
    Spacetime
    Ratings:
    +44,240
    I think it's a trick of the perspective. The moons are at similar points in their orbits, and the probe is passing by them. Their "movement" is really just the changing perspective of the probe.
    • Agree Agree x 1
  8. Marso

    Marso High speed, low drag.

    Joined:
    Mar 27, 2004
    Messages:
    27,998
    Location:
    Idaho
    Ratings:
    +12,385
    Hmm. I thought of that, but it would mean Cassini was moving retrograde to the planet's spin and the orbits of the moons. Possible, but it doesn't seem like the best way to do a grav-assist. Either that, or the camera is inverted in the picture, and 'up' is looking towards Jupiter's 'south pole.'
  9. ed629

    ed629 Morally Inept Banned

    Joined:
    Apr 10, 2004
    Messages:
    11,058
    Ratings:
    +10,907
    I noticed that as well.