21st Century Astronomy
21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 3, Problem 10QP
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An astronomical unit a.is the average distance from the Earth to the Sun. b.is about 150 million kilometres. c.is measured using radar signals bouncing off Venus. d.has units of distance. e.all of the mentioned choices. Galileo made many discoveries. Which one of these is not attributed to him? a.that the Moon has mountains, valleys and craters b.that the Sun has imperfections known as sunspots c.that four small points of light orbit the planet Jupiter d.the invention of the telescope e.that Venus shows a complete cycle of phases Which one of these statements describes why the planet Venus is much warmer than Earth? a.Venus has a denser and deeper atmosphere. b.It is closer to the Sun than Earth. c.It experienced a 'runaway greenhouse effect' long ago. d.It produces more carbon dioxide than is absorbed by the surface. e.all of the mentioned statements
1) The average distance from the moon to the earth is 385,200 km. Convert this distance to miles by multiplying by 0.6 miles/km. This is the radius of the moon’s orbit.
7. Which civilization first attempted to use geometry to describe reasons for the motions of the planets in the sky?   a. British.   b. Maya.   c. Greeks.   d. Babylonians.
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