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Closed vs. Open Design Telescopes

Diagram that shows two types of telescopes: closed-design telescopes and open-design telescopes.
Enclosed designs protect telescopes that detect visible light from stray light. Open designs protect telescopes that detect infrared light from heat.
  • Release Date
    May 4, 2016
  • Credit
    Image: NASA, ESA, CSA, STScI

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Last Updated
Aug 28, 2025
Contact
Media

Laura Betz
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
laura.e.betz@nasa.gov

Image Credit

NASA, ESA, CSA, STScI

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