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1 review
by: Lexi Scanlan

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# Astronomy Week 1

Lexi Scanlan
UCSB
GPA 3.63

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Introductory Notes to Astronomy
COURSE
PROF.
TYPE
Class Notes
PAGES
1
WORDS
CONCEPTS
astronomy
KARMA
25 ?

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"Amazing. Wouldn't have passed this test without these notes. Hoping this notetaker will be around for the final!"
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## Popular in Department

This 1 page Class Notes was uploaded by Lexi Scanlan on Saturday February 6, 2016. The Class Notes belongs to at University of California Santa Barbara taught by in Summer 2015. Since its upload, it has received 11 views.

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## Reviews for Astronomy Week 1

Amazing. Wouldn't have passed this test without these notes. Hoping this notetaker will be around for the final!

-Unique Parisian

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Date Created: 02/06/16
Astronomy Notes Lecture 1 01/06/2014 ▯ jatila@physics.ucsb.edu ▯ 2225 broida Mondays&Fridays 11-1 ▯ http://web.physics.ucsb.edu/~astro1/w2014/ ▯ ▯ ▯ Powers of 10  100= 10^2  1/100= 10^-2  100 x 1000 = 10^5 ▯ Moon is 3474 km in diameter  384000 km away from earth  Earth’s diameter is ~3.67 times the moon’s diameter ▯ Sun is 1.39x10^6 km wide  The Sun is approx.. 100 Earths wide and Earth is approx. 100 Moons wide o 400 moons would fit across the Sun’s equator ▯ 1 Astronomical units  approx. 150 millions kilometers, or 1.5x10^8  average distance between the Earth and the Sun  1 au o 108 Suns would fit between the Earth and the sun ▯ The Solar System  Pluto is NOT a planet anymore  Distance from center of Sun to average orbital distance of Neptune is approx. 30 au ▯ One way of measuring distances to close-by stars is with parallax, using the average diameter of the Earth’s orbit.  1 arc second= 1/3600 of 1 degree ▯ ▯

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