ASTR 121- Final Exam Guide - Comprehensive Notes for the exam ( 49 pages long!)
28 Mar 2018
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Error: eccentric orbit of earth, not exactly one. We can"t put a mirror on the stars. Luminosity of stars from distance and apparent brightness (flux) Degree of ionization revealed in spectrum; gives spectra type. 2000 years ago hipparchus ranked the apparent brightness of stars according to magnitudes 6th magnitude: faintest stars to the human eye. Based on logarithmic sensitivity of the human eye. Difference of 5 mag is a factor of 100 if flux. The absolute magnitude of an object is apparent magnitude if it were placed at a distance of 10 pc. The shift in angle of parallax depends on angle. Three traditional ways to identify a binary system: But we can also get doppler shifts pf pulsars. Combine kepler"s third law with mass balance to derive stellar masses sometimes individually: Find star masses range from >100 to . 08 &"( The individual masses can be found if you have:
