PHYS10140 Study Guide - Final Guide: Celestial Spheres, Spectroscopy, Type Ia Supernova
Document Summary
Scientific method: humans can see 12 orders of magnitude. Earth (sec), solar system (hours), galaxy (90,000 ly), clusters of galaxies: statistical noise- no data, systematic- incorrect assumption, the systematic study of nature- use models and test them. Constellations: new zealand, scorpio hook, figures in sky, unrelated stars. Motions in the sky: perihelion-closest to the sun, aphelion- farthest from the sun. (earth) (moon, perigee- closest to the earth, apogee- farthest from the earth. Celestial coordinates: with respect to the stars. Shorter than solar time: hours are set at vernal (3/21) equinox east. Moon phases: not related to distance, axis of rotation is 23. 5, blue moon= second full moon in a month. Lunar eclipse: new (0), (7), full (14), (21, appears red through refraction. Must be near the nodes of the earth. Parallax: photosphere covered, shows chromosphere and outer corona, seeing a star from 2 positions, only way to directly measure distance. Palmer 2: planets double back, goes east for a bit.
