1. Our web server is getting tweaked this week and as a result some links are behaving strange. We're working on getting everything back to normal ASAP.
    Dismiss Notice
Dismiss Notice
Alien Soup is a free community for fans of science-fiction, horror, & fantasy! Everybody is welcome here.

Vanishing Act

Discussion in 'Tech, Science, and Space' started by Robby, Jun 21, 2008.

  1. Robby

    Robby The Robot

    Joined:
    Jul 28, 2004
    Location:
    Terra
    [​IMG]


    Vanishing Act
    Phoenix Mission Team, NASA, JPL-Caltech, U. Arizona, Texas A&M University

    Explanation: Compare these two close-up pictures taken on sol 20 (left) and sol 24 of a trench dug in the Martian surface by NASA's Phoenix Lander. Those sols of the Phoenix Mission (a sol is a Martian day), correspond to June 15 and 18 on planet Earth. Light-colored, dice-sized chunks, visible in the lower left shadow region of the trench in the sol 20 image have vanished by sol 24 -- a strong indication that the chunks were ice uncovered by digging the shallow trench. The vanishing act likely demonstrates the sublimation of ice in the trench, a process similar to evaporation, in which the ice went directly from solid to gas after it was exposed to sunlight and the thin, dry Martian atmosphere.




    (Via NASA)
     

Share This Page