Cosmic Scales Astr 1010-100
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This 1 page One Day of Notes was uploaded by Alyssa Karounos on Friday January 9, 2015. The One Day of Notes belongs to Astr 1010-100 at University of Washington taught by Dr. Oliver Fraser in Winter2015. Since its upload, it has received 164 views. For similar materials see Introductory Astronomy 1 in Astronomy at University of Washington.
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Date Created: 01/09/15
1520 1 5 1 Today s Goals A Compare the relative sizes of common objects in the Universe B Arrange the basic levels of structure in the universe in order of increasing size C Relate sizes masses densities etc using representative units Earth masses Solar Luminosities etc 11 Distance in Space Small A Distance between Earth and Sun 1 Called an Astrological Unit AU 2 The Earth is 1 AU away from the Sun B The AU 1 150 million Km 93 million miles 2 Planets range from 04 to 40 AU from the Sun C The Sun weighs 1989 X 103 0 kg 1 or weighs 1 M M stands for Mass a one solar mass 2 Stars range in size from 02 M to 60 M 111 Distance in Space Medium A The distance light travels in one year 1 one light year ly B The nearest star is 424 ly away IV The LY A 63 thousand AU B 10 trillion km 6 trillion miles C Stars you see range from 3 1000 of light years away D Star clusters stars together in space 1 difference from constellations V The amount of energy that comes out of the Sun every second is know as a Solar Luminosity A The Sun s luminosity is 1L B Stars range from 1100 L to 1000000 L 1 Or 10392 to 106L C How much brighter is the brightest star than the dimmest 1 108 D How much brighter is the brightest star that the Sun 1 106
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