Astronomy Final Exam Study Guide

Astronomy Final Exam Study Guide - Astronomy Final Exam...

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Astronomy Final Exam Study Guide Parallax - Method of triangulation used by astronomers to measure distances between the stars. Baseline - Earth’s orbit. - Time to measure= 6 months - Bigger the orbit, the better Parsec - Measures distances. It is the distance to a start that has a parallax angle of 1 second. Apparent Magnitude (m) - Visual brightness or uncorrected brightness. Absolute Magnitude (M) - Brightness at 10 parsecs. Magnitude - Brightness. How bright it appears or really is. Luminosity -Total energy the star radiates in one second. Spectral Type - A stars position in the temperature classification system. O, B, A, F, G, K, M ranging from hot to cool. Binary Stars - Pairs of stars that orbit each other. - Visual, Spectroscopic, and Eclipsing. - To find the mass of a binary star system, you must know the size of the orbits and the orbital period. Eclipsing Binary Star Diameters - When one star moves in front of the other and blocks some of the light and the star is eclipsed. Mass-luminosity Relation - The more massive a star is, the more luminous it is. H-R Diagrams Protostar - A contracting cloud of dense gas that will eventually become a star. Main Sequence - Planetary Nebulae - An expanding shell of gas ejected from a star during the latter stages of its evolution. - So called because it looks like the greenish-blue disk of a planet such as Uranus or Neptune. Emission Heat Radiation Reflection Bluish Dark Reddening of star light White Dwarf - Second most common kind of star. - Equilibrium by electron degeneracy
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- Size of earth - Mass=mass of the sun Red Giant - Sources of Energy and of Hydrostatic equilibrium - Law of conservation of energy says that energy cannot
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This note was uploaded on 09/08/2008 for the course ASTRO 101 taught by Professor Burchick during the Spring '08 term at Ball State.

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Astronomy Final Exam Study Guide - Astronomy Final Exam...

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