Primary Mirror

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)

    “She left the web, she left the loom,
    She made three paces through the room,
    She saw the water-lily bloom,
    She saw the helmet and the plume,
    She looked down to Camelot.
    Out flew the web and floated wide;
    The mirror cracked from side to side;
    “The curse is come upon me,” cried
    The Lady of Shalott.”
    —Alfred Tennyson (1809–1892)