Kepler determined the shape of each planet's orbit by triangulation from different points on Earth's orbit, using observations made at many different times of the year
Indicate whether the statement is true or false
TRUE
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In which material does light travel fastest?
A) glass B) water C) plastic D) air E) same for all
How much longer does the Sun have to live?
A: About a month- no need to study for finals! B: About 2 years- are you going to graduate in time? C: About a million years- not too much to worry about. D: About 5.5 billion years- what is humanity going to be like? E: The Sun won't die- how silly is that?
Which of the following would not be considered evidence for dark matter in clusters of galaxies?
A) the total amount of stars B) the temperature of the intergalactic gas C) the velocities and radii of galaxy orbits around the center of mass in the cluster D) the curvature of gravitationally-lensed galaxies
The terrestrial planets and the giant planets have different compositions because
Choose one: A. the terrestrial planets have few moons. B. the giant planets are much larger. C. the terrestrial planets are closer to the Sun. D. the giant planets are mostly made of solids.