AST FINAL REVIEW

AST FINAL REVIEW - AST FINAL REVIEW 1) On Sheet 2) Right...

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AST FINAL REVIEW 1) On Sheet 2) Right Ascension: How far east from the spring (vernal) equinox. Declination: How far north from the celestial equator. 3) Table: 4) Spectra and Properties a. Thermal (or continuous) spectrum – i. Produced by a ho and dense body ii. The spectrum tells us the temperature of the body b. Absorption Spectrum i. Produced by a cold dilute gas in front of a hot and dense body ii. Abbreviation Prefix Power K kilo 10^3 M mega 10^6 G giga 10^9 m milli 10^-3 μ micro 10^-6
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Tells us chemical composition of the cold dilute gas c. Emission Spectrum i. Produced by a hot dilute gas ii. iii. Tells us the chemical composition of the hot gas 5) A microwave is an electromagnetic wave (a form of light). a. Use c = λ x v (where c is the speed of light). b. Isolate v: i. v = c / λ ii. c = 3 x 10^5 6) Two stars, A and B, are equally luminous. Star A appears to be 9 times dimmer than star B. a) (4 points) Which star is closer to us? b) (6 points) How many times closer is it? (You are being asked to compare the distances to stars A and B) a) Star A and B have the same luminosity, but appears to be dimmer. Therefore, B must be closer to us.
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This note was uploaded on 04/21/2008 for the course AST 104 taught by Professor Dontremember during the Fall '08 term at Syracuse.

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AST FINAL REVIEW - AST FINAL REVIEW 1) On Sheet 2) Right...

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