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Pic of the Day (27th Oct)

Discussion in 'TOSAH Archive' started by Event Horizon, 27 Oct 2002.

  1. Event Horizon

    Wise Guy

    Joined: 18 Oct 2002

    Posts: 2,169

    Location: Let me out!

    [​IMG]

    Full size Image

    The largest canyon in the Solar System cuts a wide swath across the face of Mars. Named Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the Earth's Grand Canyon in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep.

    The origin of the Valles Marineris remains unknown, although a leading hypothesis holds that it started as a crack billions of years ago as the planet cooled. Recently, several geologic processes have been identified in the canyon. The above mosaic was created from over 100 images of Mars taken by Viking Orbiters in the 1970s.
     
  2. derk

    Mobster

    Joined: 18 Oct 2002

    Posts: 2,937

    Location: Lancashire

    Are some of the tracks on the surface what was supposed to have been evidence of the flow of water or are they just the result of storms or something ?
     
  3. Event Horizon

    Wise Guy

    Joined: 18 Oct 2002

    Posts: 2,169

    Location: Let me out!

    Yes some of the markings on the surface are still considered to be evidence of massive water flow at one time in the past. The main fissure you are looking at is thought to have been created a very long time ago by the rapid cooling of the crust. Water in solid form is still thought to be present in abundance especially around the polar regions ;)
     
  4. derk

    Mobster

    Joined: 18 Oct 2002

    Posts: 2,937

    Location: Lancashire

    eeemh .......I dont think I will be moving house just yet then :D

    Good cooling can be useful but thats just too much :D;)
     
  5. MDPlatts

    Man of Honour

    Joined: 18 Oct 2002

    Posts: 4,422

    Location: 2nd City - Manchester.

    Schweet!
     
  6. [ASSE]Arnie01

    Mobster

    Joined: 18 Oct 2002

    Posts: 3,636

    Very nice picture matey. The mind boggles at how they come up with such amazing pictures from space. All the ones you have posted so far have been spectucularly crystal clear.

    Truly amazing.
    Arnie
     
  7. Event Horizon

    Wise Guy

    Joined: 18 Oct 2002

    Posts: 2,169

    Location: Let me out!

    I have tried to find the best i can;) Its especially amazing when you consider that this photo was taken in 1970!
     
  8. taliesyn

    Mobster

    Joined: 18 Oct 2002

    Posts: 4,141

    Location: North Wales

    Nice piccy again EH. It's amazing how much of the planet's area is taken up by that one feature :)
     
  9. daesdaemar

    Gangster

    Joined: 18 Oct 2002

    Posts: 153

    Location: across the pond...

    Awesome...
     
  10. PurDunamis

    Wise Guy

    Joined: 18 Oct 2002

    Posts: 1,179

    Location: Messing with a Nd:YAG, DCM and a Raman Shifter

    Very nice:)

    (this post is in no way a cheap bump;):D)