In addition to proposing that planetary orbits are elliptical, what other modification did Kepler make to Copernicus's model? A. Planets closer to the Sun move faster.
B. Planets spin in an epicycle while orbiting Earth.
C. Venus has phases due to its orbiting of the Sun.
D. Earth's rotation causes the rising and setting of the Sun.

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies? a. it's a region that exhibits a weak gravitational pull, thus maintaining a safe distance from the sun. b. it's an area that doesn't experience any major weather events that could cause mass extinctions. c. it's an area that's an optimal distance from the sun for potentially supporting life. d. it's a region that's unaffected by asteroid or meteor impacts.