Monday, 15 February 2010

Cassini Spacecraft Crosses Saturn's Ring Plane

Click on image to enlarge
Cassini Spacecraft Crosses Saturn's Ring Plane
Credit: Cassini Imaging Team, ISS, JPL, ESA, NASA
Explanation: If this is Saturn, where are the rings? When Saturn's "appendages" disappeared in 1612, Galileo did not understand why. Later that century, it became understood that Saturn's unusual protrusions were rings and that when the Earth crosses the ring plane, the edge-on rings will appear to disappear. This is because Saturn's rings are confined to a plane many times thinner, in proportion, than a razor blade. In modern times, the robot Cassini spacecraft orbiting Saturn now also crosses Saturn's ring plane. A series of plane crossing images from late February was dug out of the vast online Cassini raw image archive by interested Spanish amateur Fernando Garcia Navarro. Pictured above, digitally cropped and set in representative colors, is the striking result. Saturn's upper atmosphere appear in gold. Since Saturn just passed its equinox, today the ring plane is pointed close to the Sun and the rings could not cast the high dark shadows seen across the top of this image, taken back in 2005. Moons appear as bumps in the rings.

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2 comments:

  1. If the picture looks off, it's because of the shadow made by the rings.

    ReplyDelete
  2. Hey Black Light, yeah I see it.

    ReplyDelete