AST 1001 Study Guide - Midterm Guide: Friedrich Bessel, Coronal Mass Ejection, Apparent Magnitude
Document Summary
Motions (radial velocity & doppler effect) (proper motion: radial velocity: the speed of an object toward or away from us, or, that portion of an object"s velocity parallel to the line of sight. We measure radial velocity by the doppler shift of the object"s spectrum: moving toward us blueshift, away from us redshift, proper motion: the change in the location of a star on the celestial sphere, cannot be determined by doppler shift. Atomic structure and atomic spectra: atomic number = # of protons. Masses and sizes from binary stars: binary stars, visual binaries those that can be resolved into two district star images. Midterm ii study guide: spectroscopic binaries a system detected from the periodic shift of its spectral lines. Chromosphere sphere of color : dim layer of less dense stellar gas above photosphere, this layer is visible during total solar eclipses, spicules: jets of gas in the chromosphere, supergranule: large convective cell in chromosphere containing many granules.
