PHYS 1600 Chapter Notes - Chapter 15: Galactic Center, Sagittarius A*, Photon
21 Dec 2015
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Document Summary
15-1 studies of cepheid variable stars revealed that the milky way is. With the high resolution telescope, lord rosse observed that some of the. Shapely-curtis debate: shapely argued the spiral nebulae are relatively small, nearby objects scattered around our galaxy. Curtis argued the island universe theory, arguing each of the spiraling o. Hubble discovered the first nova on a photograph plate and realized the nebulae is a separate rotating system of stars object was actually a cepheid variable star. Hubble could use the characteristics of the fluctuating light of cepheid variable stars to calculated the distance. Most distance object in universe that can be seen with the naked eye. M31 (andromeda galaxy) is some 2. 2 million ly beyond the milky way o. The sun is 26,000 ly from the galaxy"s center (galactic nucleus) The structure of our galaxy and out place in it. 15-2 cepheid variables help us locate our galaxy"s center.
