NS101 - 15.5 Assessment

What means “sometimes slowing, then reversing direction in a loop before resuming normal motion”? 

• Epicycle

• Retrograde

• Orbit

• Rotation

What does "helio" mean?

• Moon

• Earth

• Stars

• Sun

True or False: Early Greek astronomers used a geocentric model to explain observed motions of the planets.

• True

• False

Which law stated that each planet orbits in the shape of an ellipse, with the Sun located at one focus?

• 1st

• 2nd

• 3rd

Whose observations resulted in the first precise, continuous record of planetary position?

• Ptolemy

• Copernicus

• Brahe

• Kepler

Who proposed the three laws of planetary motion?

• Kepler

• Brahe

• Ptolemy

• Copernicus