A primary mirror (or primary) is the principal light-gathering surface (the objective) of a reflecting telescope.
Read more about Primary Mirror: Description, Superlative Primary Mirrors
Famous quotes containing the words primary and/or mirror:
“The primary function of a theater is not to please itself, or even to please its audience. It is to serve talent.”
—Robert Brustein (b. 1927)
“Looking at yourself in a mirror isn’t exactly a study of life.”
—Lauren Bacall (b. 1924)
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