Exam_III_Study_Guide

Exam_III_Study_Guide - Exam III: Study Guide A. Sun as a...

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Exam III: Study Guide A. Sun as a star – fundamental processes by which it produces energy 1) The sun is a low mass star and will eventually die out as a white dwarf 2) It makes energy by nuclear fusion, converting hydrogen to helium B. HR Diagram 1) Luminosity is the actual brightness of a star, regardless of its distance. You can determine luminosity by the formula of apparent brightness = Luminosity/4π x (distance) 2 2) Temperature of a star surface temp only is determined by the star’s color or spectrum 3) Mass is the most important component of a star. It says where it falls on the main sequence, as well as what kind of lifespan it will have C. Lives of Stars 1) Stars on the main sequence burn hydrogen to helium in their cores. 2) They evolve off the main sequence when they’ve burned off all the hydrogen in their cores 3) The more massive the object, the shorter its lifespan and the less it will be on the main sequence 4) Clusters (stars that formed around the same time) can be plotted on HR
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This note was uploaded on 10/17/2011 for the course ISP 205 taught by Professor Donahue during the Fall '08 term at Michigan State University.

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Exam_III_Study_Guide - Exam III: Study Guide A. Sun as a...

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