Astronomy Review

What is at the middle of a Geocentric system?

• Sun

• Neptune

• Earth

• The Universe

What is the name of this model?

• Heliocentric Model

• Kepler Model

• Galileo Model

• Geocentric Model

What is Kepler's 1st law?

• The planets orbit in an ellipse

• The plants move faster when they are closer to the sun and slower when they are further from the sun

• The farther a planet is from the sun the slower the orbit

  (P² = a³)

Ptolemy used epicycles to explain the motions of the sun, moon, and planets in his ____ model of the solar system. that had everything orbiting Earth.

• heliocentric

• geocentric

• orrery

Answer explanation

This astronomer confirmed the heliocentric theory with his telescope and discovered 4 moons of Jupiter.

• Galileo
• Kepler
• Copernicus
• Aristotle

Made careful observations & recorded positions of planets by observing from his observatory.

• Tycho Brahe
• Ptolemy
• Copernicus
• Aristotle

Which astronomer developed the first detailed heliocentric model of the solar system?

• Newton

• Ptolemy

• Copernicus

• Galileo

Which astronomer believed that gravity and inertia keep the planets in orbit?

• Kepler

• Copernicus

• Galileo

• Newton

Which of the following astronomers believed in a geocentric model of the solar system?

• Ptolemy

• Kepler

• Galileo & Copernicus

• All astronomers

What was the missing force in Kepler's 3 Laws of Planetary Motion that Newton later discovered?

• Eccentricity

• Weight

• Mass

• Gravity