![Technicians in blue suits, face masks, and head coverings look into Hubble's large primary mirror on a stand in a laboratory. They are reflected in the highly polished mirror.](https://science.nasa.gov/wp-content/uploads/2023/04/hubble-about-primary-mirror-jpg.webp?w=4096&format=png)
Technicians Examining Hubble’s Primary Mirror
Prior to installation, technicians inspect the primary mirror of the Hubble Space Telescope.
Credits: NASA
Image CreditNASA
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Prior to installation, technicians inspect the primary mirror of the Hubble Space Telescope.