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Science Chapter 18.1 Review P ower P oint. Question 1. What is the time required for Earth to rotate once on its axis?. Question 2. Which astronomer showed that planets and moons stay in orbit due to gravity?. Question 3.
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Question 1 • What is the time required for Earth to rotate once on its axis?
Question 2 • Which astronomer showed that planets and moons stay in orbit due to gravity?
Question 3 • What is roughly the amount of time required for the moon to orbit once around the Earth?
Question 4 • Who was one of the first astronomers to use a telescope to observe celestial bodies?
Question 5 • What is the time required for the Earth to orbit once around the Sun?
Question 6 • Which astronomer developed a theory of a sun-centered universe?
Question 7 • Which astronomer proved the existence of galaxies other than the Milky Way?
Question 8 • Which astronomer stated that the planets move in elliptical orbits around the Sun?
Question 9 • Which astronomer developed a theory of an Earth-centered universe?
Question 10 • Which astronomer used a mural quadrant to measure the positions of planets and stars?
Question 11 • What is the study of the universe?
Answers • Day 8. Kepler • Newton 9. Ptolemy • Month 10. Brahe • Galileo 11. Astronomy • Year • Copernicus • Hubble