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Astro 100-02 Notes from week 1

by: Coco Chen

Astro 100-02 Notes from week 1 astro100-02 Exploring the Universe

Coco Chen
GPA 3.567
Exploring the Universe
Daniel Wang

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About this Document

Astro 100-02 is an introductory course for Astronomy. Basically what we did in class on the first week was going over some scientific notations, special units, and some important formulas.
Exploring the Universe
Daniel Wang
One Day of Notes
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This 3 page One Day of Notes was uploaded by Coco Chen on Friday January 30, 2015. The One Day of Notes belongs to astro100-02 Exploring the Universe at University of Massachusetts taught by Daniel Wang in Winter2015. Since its upload, it has received 209 views. For similar materials see Exploring the Universe in Astronomy at University of Massachusetts.


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Date Created: 01/30/15
Astronomy 10002 Professor Wang Daniel Meets on TuTh 230 Class 1 Our course website is WWWastroumasseduuwada100 First of all we have to be able to contrast Astronomy and Astrology Astronomy is the study of the stars but today refers to the study of celestial objects Astrology is the study of stars but today refers to how patterns of stars may related to the course of human events The Scientific Method figure Collect Data x Recognize patterns 1 Predict new observations Form hypothesis Here are some important units to know Trillion Tera T 10quot12 Billion Giga G 10quot9 Million Mega M 10quot6 Thousand Kilo K 10quot3 Thousandth Mili m 10quot3 llillix1a nth With in u l billionth nano n 10quot9 Metric vs English system Type Metric MKS English Length mkm in ft mi Time s s Mass kg pound Angle degree degree Useful formulas 1 miles 5280 ft Speed of light 3 x 10quot5 km s 1AU 150 million km15O x10quot6 km 1year 315 X10 3 11 year 3 x10quot5 kms x 315 X10 3 945 x10quot12 Age of universe 15 Gyr 15 x 10quot9 Remember there is unit conversion and we cancel same units ex 50 mihr x 3hrs 150 mi 1hr x hr canceled each other However we can not cancel time from distance or cancel mass from angle We can only cancel out the like units like g and kg s and hr we rst change the like units into the same unit then we can cancel them out Let s review the power of 10 positive powers Negative powers 10quotO1 basically any numberquot01 10quot1O1 10quot11O 10quot2001 1OA21OO 10quot30001 1OA31OOO 10quot400001 1OA41OOOO the scientific notation a number that can be expressed as 13 X 210 times power of 10 for example 345880 in scientific notation would be 345880 x 10A5 000678 678 x 10A3 0000199 199 x 10A4 some tricks for calculations in scientific notation aquot3 x aquot5aquot8 ex 9 3 x 9quot59quot8 a x10quotA x b x10quotB a x b x 10quotAB ex 15 x10quot5x35 x10quot3 15x35x10quot8 wHltv I 8 mm ltmm mmltmm me omltmn ltm 8 9m 832m umltm 3 Us 38 Fm m ltm


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