ASTRONOMY 110 MIDTERM TEST FALL 2017 STUDENT NAME 1. According to Kepler\'s thir
ID: 1775129 • Letter: A
Question
ASTRONOMY 110 MIDTERM TEST FALL 2017 STUDENT NAME 1. According to Kepler's third law (p2 - a3), how does a planet's mass affect its orbit around the Sun? A) A planet's mass has no effect on its orbit around the Sun. B) A more massive planet must have a larger semimajor axis. C) More massive planets orbit the Sun at higher average speed. D) More massive planets must have more circular orbits 2. He discovered that the orbits of planets are ellipses. A) Tycho Brahe B) Copernicus C) Kepler D) Galileo E) Ptolemy 3. How did the Ptolemaic model explain the apparent retrograde motion of the planets? A) It held that B) It held that t C) It held that sometimes the planets moved backwards along their circular D) It held that the planets moved along small circles that moved on larger circles around Earth, and that the combined motion sometimes resulted in backward motion. t the planets resided on giant spheres that sometimes turned clockwise and sometimes turned counterclockwise. his motion occurs as Earth passes by another planet in its orbit of the Sun. 4 Which of the following is not necessary of a good scientific theory? A) A scientific theory cannot be accepted until it has been proven true beyond all doubt. B) A scientific theory should be based on natural processes and should not invoke the supernatural or divine C) A scientific theory must explain a wide variety of phenomena observed in the natural world D) A scientific theory must make testable predictions that, if found to be incorrect, could lead to its own modification or demise. 5. Which of the following statements about Copernican model for the solar system is false? A) It used combinations of perfect circles to describe the orbits of the planets. B) It was not widely accepted or even read when it was published. C) It made better predictions than the Ptolemaic geocentric model. D) It assumed the Sun is in the center of the solar system. 6 Which of the following methods has led to the most confirmed discoveries of massive planets orbiting near their parent stars A) detecting the starlight reflected off the planet B) detecting the infrared light emitted by the planet C) detecting the gravitational effect of an orbiting planet by looking for the Doppler shifts in the star's spectrum D) detecting the shift of the star's position against the sky due to the planet's gravitational pull E) detecting a planet ejected from a binary star system 7 Which of the following methods has led to the most discoveries of extrasolar planet candidates? A) detecting the dip in measured brightness as the planet crosses our line of sight to the star B) detecting the infrared light emitted by the planet C) detecting the gravitational effect of an orbiting planet by looking for the Doppler shifts in the star's D) detecting the shift of the star's position against the sky due to the planet's gravitational pull E) detecting a planet ejected from a binary star system 8 The Doppler method can be used to measure the orbital period of a planet by A) measuring the speed at which the star orbits the mutual center-of-mass of the star and planet B) measuring the time it takes for the star's line-of-sight velocity to cycle from peak to peak C) measuring the asymmetries in the velocity curve D) measuring the amount by which the starlight is reduced when the planet transitsExplanation / Answer
1.(a)
2.(c)
3.(d)
4.(a)
5.(c)
6.(c)
7.(a)
8.(b)
since you asked just for right options.Good luck.