Public domain
History of Hubble Space Telescope (HST)
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
This photograph shows the Hubble Space Telescope's (HST's) Primary Mirror being ground at the Perkin-Elmer Corporation's large optics fabrication facility. After the 8-foot diameter mirror was ground to shape and polished, the glass surface was coated with a reflective layer of aluminum and a protective layer of magnesium fluoride, 0.1- and 0.025-micrometers thick, respectively.
NASA Image and Video Library’s own descriptionCredit lineHistory of Hubble Space Telescope (HST). NASA/MSFC, 1979-03-01. Public domain. ID: 7995584.
