ASTR 114 Lecture Notes - Lecture 24: Spiral Galaxy, Binary Star, Solar Cycle
10 Jan 2020
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Document Summary
If orbital radius of earth was greater than its actual value, parallax angle with increase: distance of far-away galaxies can be measured by using supernova explosions, cepheid variables most appropriate for determining distances to nearby galaxies. Miscellaneous (exam answers: pattern of rising hot gas cells over photosphere = granulation, stellar property with greatest range in values = luminosity, sunspot cycle is not very steady. In the proton-proton cycle, the helium atom and neutrino have less mass than the original hydrogen. A particular star has an absolute magnitude of m=-0. 3. Determine the luminosity of the star compared to the sun and hence which star is a candidate according to hr diagram. The sun has apparent brightness b at the earth, which is 1. 5*10^8 km away. The diagram shows a binary star system where the mass of the smaller star is 8 solar masses.
