Thursday, February 26, 2009

This is Henrietta, named after Henrietta Swan Leavitt (July 4, 1868 – December 12, 1921). While working at the Harvard College Observatory cataloging the brightness of variable stars from photographic plates, Henrietta discovered the pattern of luminosity in stars. Her discovery, later recognized as the 'Period-luminosity relationship' She published her findings in 1908 showing that there is a simple relationship between the brightness of the variable and their periods of brightness. This relationship provided an important yardstick for measuring distances in the Universe. Two other notables about Henrietta; she was deaf, and, women were not even allowed to use telescopes at the time.

Anyway, my Henrietta is a Meade etx125 ec Maksutov-Cassegrain telescope sans UHTC or SmartFinder. Small enough to be pretty mobile but with a 1900mm focal length and a 127mm apeture, we do just fine. Great for photography day or night.

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