Question 4
1 / 1 point
When Copernicus first created his Sun-centered model of the universe, it did not lead to
substantially better predictions of planetary positions than the Ptolemaic model. Why not?
Question 5
1 / 1 point
If a planet has an orbital period of P
2
= 49.0 years
2
, what would be the average distance in AU
3
?
Question 6
1 / 1 point
According to the geocentric view, everything in the heavens had to go around the Earth, which
was the center of the universe. What objects did Galileo discover with his telescope that clearly
didn't go around the Earth?
Question 7
1 / 1 point
Which person below wrote On the Revolution of the Celestial Orbs?
Copernicus placed the Sun at the center but did not realize that the Moon orbits Earth.
Copernicus misjudged the distances between the planets.
Copernicus used perfect circles for the orbits of the planets, whereas planets actually
have elliptical orbits.
Copernicus placed the planets in the wrong order going outward from the Sun.
7.0 AU
3
49.0 AU
3
3.66 AU
3
117,649 AU
3
stars in the Milky Way that just kept going in a straight line.
moons around the planet Jupiter.
the Earth's Moon.
a ring around the Sun.
Brahe
