Earth-Moon-Sun System Answers

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Johannes Kepler is known for which discovery in astronomy?

A
discovering planets around other stars
B
determining planetary laws of motion
C
recording 20 years of data about planetary motion
D
proposing the heliocentric model of the solar system
4

Which statements describe the relationship of Earth and its moon? Check all that apply.The moon orbits Earth following a nearly circular path.The gravitational pull of Earth on the moon is parallel to the velocity of the moon.The moon orbits Earth in 1 Earth day.The same face of the moon always points toward Earth.The moon’s orbit is the result of the interaction between the moon’s inertia and the gravitational force from Earth.

A
The moon orbits Earth following a nearly circular path.
B
The gravitational pull of Earth on the moon is parallel to the velocity of the moon.
C
The moon orbits Earth in 1 Earth day.
D
The same face of the moon always points toward Earth.
E
The moon’s orbit is the result of the interaction between the moon’s inertia and the gravitational force from Earth.
5

Based on Kepler’s work, which best describes the orbit of a planet around the Sun?

A
a circle with the Sun at the very center
B
an ellipse with the Sun at the very center
C
a circle with the Sun at one edge
D
an ellipse with the Sun at one focus
6

Kepler’s first law states that the orbits of planets are ellipses with the Sun at one .

Answer not available
9

What is an astronomical unit (AU)?

A
the diameter of the Sun
B
the radius of the Sun
C
the average distance between Earth and its moon
D
the average distance between Earth and the Sun

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Earth-Moon-Sun System Answers — BHS-Physics A-CR…