Unit 1: The History of Astronomy Exam Review

The formula P² = a³ is an expression of

• Kepler's 3rd Law

• Newton's 2nd Law

• Kepler's 1st Law

• Kepler's 2nd Law

What did Galileo NOT see?

• Mountains on the earth's moon.
• Uranus's moons Titania and Oberon.
• Jupiter's 4 largest moons.
• The phases of Venus.

Which astronomer of antiquity measured the size of the earth?

• Aristarchus
• Ptolemy
• Copernicus
• Eratosthenes

Which astronomer of antiquity made elaborate models of an earth-centered universe?

• Copernicus
• Aristarchus
• Ptolemy
• Tycho Brahe

Which astronomer of antiquity first applied a telescope to astronomical observation?

• Ptolemy
• Galileo Galilei
• Tycho Brahe
• Copernicus

Ancient Greeks believed, the earth to be the centr of the universe. What do we call this model?

• Ptolemic System
• Geocentric Universe
• Heliocentric Universe
• Copernican Model

Ancient astronomers used 'epicycles' to explain...?

• Retrograde Motion
• Constellation Movement
• Moon's Phases
• Planetary Transits

Tycho Brahe's biggest contribution to astronomy was...?

• Accurate Observations of the stars and planets
• His telescopic observations
• Heliocentric Universe
• His Silver Nose

Ancient astronomers believed the earth did not move because...?

• No parallax was observed in stars.
• It could explain all planetary motions.
• Other models could not explain retrograde motion.
• Because it was a First Principle.

A total solar eclipse demonstrates that the Moon and Sun are very nearly the same angular size. If the Sun is 400 times farther from us than the Moon, then the radius of the Moon must be __________ the radius of the Sun.

• 1600 times

• 400 times

• the same as

• 1/400th of