Hubble construction

  1. I did a cursory search on the forum, and I browsed Wiki.....but maybe I missed it.
    What is that big Flap/Door on the end of the scope.?
    Is it part of the optics, or is it a protection device, or a.....?
    Thank You
     
  2. jcsd
  3. Bandersnatch

    Bandersnatch 1,517
    Science Advisor
    Gold Member

    It's the aperture door. It closes to protect the optics from sunlight.

    Read more here:
    asd.gsfc.nasa.gov/archive/sm3a/downloads/sm3a_media_guide/HST-systems.pdf
     
  4. 10-4
    Thank You.....
     
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