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Lecture Question Sheet 1

Lecture Question Sheet 1 - over the course of a year 10 Is...

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Cosmos & the Earth / Fall 2007 / Lecture Question Sheet #1 1. What is the range of wavelengths of light your eye can detect, in nanometers? 2. What is the speed of light? 3. How far is a light-year in kilometers? 4. How far away is the nearest star (other than the Sun) in light years? the nearest Galaxy? what are their names? 5. What is the angular size of your thumb when you extend your arm as far as you can, in degrees? In arcminutes? In arcseconds? 6. What is the relationship between right ascension and declination in Celestial coordinates, and latitude and longitude on the Earth? 7. Where on the Celestial sphere are the celestial poles and the celestial equator? 8. What motion of the Earth is responsible for the daily rising and setting of the Sun and stars?
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– 2 – 9. What motion of the Earth is responsible for change in the part of the sky observable at night
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Unformatted text preview: over the course of a year? 10. Is there a location on Earth where one could see all of the stars in the night sky during the course of 1 year? Is there a location where one could see only half of the stars during the course of a year? 11. Write down the mathematical relationship between parallactic angle and distance. 12. If we were observing from Jupiter, which is Fve times further from the Sun, how much better would be our parallax determinations of distance over a full orbit around the Sun? That is, how many times further could the Hipparcos satellite have measured distances? Representative review questions, Chapter 1: 3, 6, 8, 17, 19 Representative self-test questions, Chapter 1: 1, 2, 11 Representative problems, Chapter 1: 1, 9, 10, 13, 14...
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