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LECTURE 4, SEPTEMBER 2, 2010

LECTURE 4, SEPTEMBER 2, 2010. ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT jcbrandt@unm.edu. Question 1. a) planets move on epicycles. b) planets orbit the Sun in the same direction. c) Earth moves faster in its orbit. d) they are closer than Uranus.

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LECTURE 4, SEPTEMBER 2, 2010

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  1. LECTURE 4, SEPTEMBER 2, 2010 ASTR 101, SECTION 3 INSTRUCTOR, JACK BRANDT jcbrandt@unm.edu ASTR 101-3, FALL 2010

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  7. Question 1 a) planets move on epicycles. b) planets orbit the Sun in the same direction. c) Earth moves faster in its orbit. d) they are closer than Uranus. e) they rotate quickly on their axes. Mars, Jupiter, and Saturn show retrograde motionbecause

  8. Question 1 a) planets move on epicycles. b) planets orbit the Sun in the same direction. c) Earth moves faster in its orbit. d) they are closer than Uranus. e) they rotate quickly on their axes. Mars, Jupiter, and Saturn show retrograde motionbecause As Earth overtakes and “passes” the outer planets, they seem to slow down and then reverse direction.

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  13. Question 8 a) Hipparchus b) Galileo c) Tycho d) Copernicus e) Kepler Who published the first astronomical observations made with a telescope?

  14. Question 8 a) Hipparchus b) Galileo c) Tycho d) Copernicus e) Kepler Who published the first astronomical observations made with a telescope? Galileo published the “Starry Messenger” in 1610, detailing his observations of the Moon, Jupiter’s moons, stars, and nebulae.

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  18. Question 10 a) Kepler b) Newton c) Galileo d) Tycho Brahe e) Copernicus Which hero of the Renaissancepostulated three “laws” of planetary motion?

  19. Question 10 a) Kepler b) Newton c) Galileo d) Tycho Brahe e) Copernicus Which hero of the Renaissancepostulated three “laws” of planetary motion? Note that Isaac Newton is also well known for three general laws of motion. But Kepler’s laws are about objects in orbits, like planets orbiting a star.

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  25. Question 14 a) increases with distance. b) depends on the state of matter (solid, liquid, or gas). c) can be attractive or repulsive. d) increases with mass. Newton’s law of gravitystates that the force between two objects

  26. Question 14 a) increases with distance. b) depends on the state of matter (solid, liquid, or gas). c) can be attractive or repulsive. d) increases with mass. Newton’s law of gravitystates that the force between two objects The attractive force of gravity INCREASES with greater mass, and DECREASES QUICKLY with greater distance. The force doesn’t depend on the kind of matter.

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