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Determing distances on the fly

  1. Sep 23, 2005 #1
    Atronomy and Cosmology aren't quite my thing. Anyone think/know of a way to calculate distances from stellar objects, particularly stars, on the fly (ie. from 1 to 5 sec) that doesn't require two telescopes a kilometer apart? I don't much care for parallax (please ignore my spelling). Thank you so much in adnvance to whom ever replies.

  2. jcsd
  3. Sep 26, 2005 #2
    Anyone have any suggestions? Anything would be appreciated... thanks again
  4. Sep 27, 2005 #3


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    'Standard candles' are usually relied upon for determining distances, especially those beyond the sensititivity of the parallax method [which is quite accurate but severely limited in range]. The first 'standard candles' [objects that have the same absolute brightness] were Cepheid variables. These, however, are too faint to be resolved beyond local galaxies. Certain, very bright types of supernova [SNe 1a in particular] are currently the most useful standard candles. We can approximate fairly distant objects [up to z~1.7] by this method. Gamma ray bursters appear to be the best candidate for the next generation of standard candles. They have been observed at distances up to z~6.5 - which is a quite a chunk of real estate.
  5. Sep 28, 2005 #4


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    So, no, there is no simple, 5-second method to calculate the distance to stars. It requires precise measurements.
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