M1_97 - ASTRONOMY 100 Dr Werner Dppen 2 pm 29 September...

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1 ASTRONOMY 100 Dr. Werner Däppen MIDTERM 1 ______________ 2 pm, 29 September 1997 Exam Number Name (Please Print) Questions 1 - 3: Match the appropriate person to the appropriate concept, observation or measurement. (You may want to use a name more than once, and then again, you may not) a) Copernicusb) Galileo c) Brahe d) Kepler e) Newton 1. made his most important contribution to astronomy through his lifetime's work of careful measurements of planetary positions. 2. was the first to introduce elliptical orbits to describe the motion of planets 3. first observed that Venus exhibited a full set of phases like the Moon 4. Newton generalized Kepler’s third law a) to incorporate the precession of the equinoxes b) to any objects orbiting any central body, and not just the planets orbiting the Sun c) to allow for the fact that objects could attain escape velocity d) to include the newly discovered planet, Uranus e) to be more precisely consistent with Galileo’s observations 5. The length of time for the Moon to move from new moon to new moon is known as one synodic month. Compared to one full orbital period with respect to the star background, or one sidereal month, this synodic month is a) exactly the same b) about two days longer c) about 2 days shorter d) about twice as long 6. The celestial analog of latitude is a) the celestial equator b) right ascension c) declination d) azimuthal angle 7. If star A and star B have the same right ascension, but star A has declination +20 o while star B has declination -30 o then you could conclude that star B is a) to the east of star A b) to the west of star A c) to the north of star A d) to the south of star A e) more distant than star A
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2 8. Star A and star B are the same size, but star A has a surface temperature half that of star B, what is the energy output of star A expressed as a fraction of that of star B a) 1/64 b) 1/16 c) 1/4 d) 1/2 e) 1/1 (the same) 9. Suppose there is a total lunar eclipse, and at the time you are on the moon looking towards the earth. What phase of the earth do you see? a) A ``new earth'' - that is the complete night side of the earth b) A ``quarter earth'' c) A ``crescent earth'' d) A ``gibbous earth'' e) A ``full earth'' - that is the full illuminated day side of the earth 10. If one doubles the frequency of a light wave then the wavelength a) is quadrupled (x 4) b) is also doubled c) remains the same d) is halved e) is quartered 11. Why is it that some solar eclipses are annular and some solar eclipses are total? Choose the most appropriate answer. a) The Moon’s orbit around the Earth is elliptical, and so the Moon’s distance from the Earth varies significantly b) The Earth’s orbit around the Sun is elliptical, and so the Earth’s distance from the Sun varies significantly c) Whether one experiences a total or annular eclipse depends upon your location of the Earth’s surface d) The Sun pulsates, and its diameter varies by about 5%. e)
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M1_97 - ASTRONOMY 100 Dr Werner Dppen 2 pm 29 September...

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