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 1,200
    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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