What planets were discovered after the invention of the telescope?

• Mercury

• Neptune

• Uranus

• Saturn

Stars that did not appear to move like other stars were called ___________ stars. The relative location of these "stars" changed over several weeks.

What does "retro" mean?

• to cross or to move

• to stay still

• backward

• to walk or step

Who was the first astronomer to propose the idea that the Earth was the center of our solar system?

• Copernicus

• Ptolemy

• Aristotle

• Brahe

Aristotle proposed that planets, the sun, and the moon move in ________ orbits.

Tags

NGSS.MS-ESS1-2

What is the name of the solar system model with the Earth at the center?

• heliocentric

• geocentric

• hydrocentric

• biocentric

_________ is the apparent shift in position of an object when viewed from different points.

The larger the shift in position, the _________ the object is to the viewer.

• farther

• closer

What did Aristotle's model fail to explain?

• parallax

• the brightness of the stars

• retrograde motion

• epicycles

What did Ptolemy add to Aristotle's model to improve it?

• epicycles

• parallax

• elliptical orbits

• the sun at the center