Cepheid Variable Stars, Supernovae and Distance Measurement
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Cepheid Variable Stars, Supernovae and Distance Measurement
While stellar parallax can only be used to measure distances to stars within hundreds of parsecs, Cepheid variable stars and supernovae can be used to measure larger distances such as the distances between galaxies.This video, Measuring the Universe, gives a great introduction to this topic. …
Jun 22, 2019
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qualitatively how does the observed brightness apparent magnitude versus intrinsic brightness absolute magnitude of cepheid variable stars in the andromeda galaxy indicate that it is several 33047
qualitatively how does the observed brightness apparent magnitude versus intrinsic brightness absolute magnitude of cepheid variable stars in the andromeda galaxy indicate that it is several 33047
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SOLVED:Go to the Goddard Multimedia website and view the animation of a Cepheid variable star in a spiral galaxy (http://svs .gsfc.nasa.gov/goto?10145). Explain how astronomers use data like these to estimate the distance to the galaxy. What is actually observed, what is assumed, and what is calculated? (Review the discussion in Chapter 16 as needed.)
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