Hubble construction

by clel miller
Tags: construction, hubble
clel miller
clel miller is offline
Feb23-14, 01:34 PM
P: 5
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
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Bandersnatch is online now
Feb23-14, 02:22 PM
P: 557
It's the aperture door. It closes to protect the optics from sunlight.

Read more here:
clel miller
clel miller is offline
Feb23-14, 02:40 PM
P: 5
Thank You.....

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