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 distinction of the artist is that he must actively cultivate that state which most men, necessarily, must avoid: the state of being alone.”
    —James Baldwin (1924–1987)

    “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)