HW1_Answers_2009-1 - Answers to Homework #1-Light Basic...

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Answers to Homework #1---Light Basic Observations- 1) The major difference between astronomy and other sciences is that with astronomy there are no controlled experiments; you must rely upon the Universe without being able to tweak things, or do things again. What is remarkable is that despite that limitation, we can find out so much about the Universe. For example, even though stars evolve over billions of years, we don’t have to wait that long to find out what happens; although we can’t see a single star evolve, we can piece together what is happening using many stars in different stages of evolution. 2) Other spectral regimes are important because some processes produce radiation that is not in the visible; for example, some stars that are almost completely invisible in the optical wavelengths produce tremendous quantities of x-rays. (Neutron stars, for example). Thus, we can piece together many different ideas by using different wavelengths. 3)
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This note was uploaded on 10/25/2009 for the course PHYSICS Astronomy taught by Professor Me during the Spring '09 term at Akademia Ekonomiczna w Krakowie.

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HW1_Answers_2009-1 - Answers to Homework #1-Light Basic...

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