Hubble Telescope: What's the Big Flap/Door?

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SUMMARY

The large flap or door on the Hubble Space Telescope is identified as the aperture door, which serves a critical function in protecting the telescope's optics from sunlight. This mechanism is essential for maintaining the integrity and performance of the telescope's imaging capabilities. Understanding the aperture door's role is vital for anyone studying the operational aspects of the Hubble Space Telescope.

PREREQUISITES
  • Basic understanding of optical systems
  • Familiarity with space telescope operations
  • Knowledge of Hubble Space Telescope specifications
  • Awareness of light protection mechanisms in astronomy
NEXT STEPS
  • Research the Hubble Space Telescope's optical design and components
  • Explore the mechanisms of aperture doors in astronomical instruments
  • Learn about the maintenance and protection strategies for space telescopes
  • Investigate the impact of sunlight on optical performance in space environments
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Astronomy enthusiasts, aerospace engineers, optical scientists, and anyone interested in the operational mechanics of space telescopes.

clel miller
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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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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
 
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Thank You...
 

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