Earth Sciences 1086F/G Chapter Notes - Chapter 2: Parsec, Parallax, Edwin Hubble
5 Aug 2020
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Andromeda: a light-year is the distance that light travels in one year, trigonometric parallax is atele method used to gauge near distance in space. It relies on an object appearing to be at a different place relative to the background, depending on viewpoint. It measures up to 500 light years distant: the first technique to measure objects that are far away deals with the brightness of stars. Diagram, relating the luminosity of stars (equivalent to brightness) to their temperature (related to colour). The sun, like most of the stars we see, falls in the class defined as main sequence . You could easily draw a line following the. Main sequence that would be a pretty good representation of the data (the dots). Now we draw a vertical line from that colour- determined temperature to intersect our line that represents the main.
