AST 101 - CH 4 EXAM QUESTIONS WITH VERIFIED ANSWERS LATEST
UPDATE 2026
Virtually no one acknowledged Galileo's work during his lifetime. - Answers False
The statement: "Planets sweep out equal area in equal time." is also known as ... -
Answers Kepler's Second Law
The key observation of Venus was that it exhibited a ________ phase. - Answers
gibbous
A complete physical theory to explain the motion of the planets was developed by ... -
Answers Newton
Virtually no one acknowledged Newton's work during his lifetime. - Answers False
What is the force of gravity (in Newtons) acting between the Sun and a 1,500-kg rock
that is 2 AU from the Sun? - Answers 2.24
What is the force of gravity (in Newtons) acting between the Earth and a 5-kg
bowling ball that is resting on the surface of the Earth? - Answers 49.07
What is the semimajor axis (in AU) of a planet with an orbital period of 14 years? -
Answers 5.808
What is the semimajor axis (in AU) of a planet with an orbital period of 75 years? -
Answers 17.78
Kepler found that planets do not move in _______ but in ________. - Answers
circles, ellipses
The statement: "A planet's orbital period squared is equal to its semimajor axis
cubed." is also known as ... - Answers Kepler's Third Law
When Kepler began his work, which solar system model was able to make the most
accurate predictions? - Answers Copernicus' model
According to Newton's Law of Gravity, if two objects were to move twice as far
apart, the force of gravity between them would be... - Answers four times smaller
What is the orbital period (in years) of a planet with a semimajor axis of 35 AU? -
Answers 207.06
What is the force of gravity (in Newtons) acting between the Earth and a 125-kg
person standing on the surface of the Earth? - Answers 1226.68
The first proof that the Earth orbits the Sun was provided by... - Answers Galileo's
observation of the phases of Venus
UPDATE 2026
Virtually no one acknowledged Galileo's work during his lifetime. - Answers False
The statement: "Planets sweep out equal area in equal time." is also known as ... -
Answers Kepler's Second Law
The key observation of Venus was that it exhibited a ________ phase. - Answers
gibbous
A complete physical theory to explain the motion of the planets was developed by ... -
Answers Newton
Virtually no one acknowledged Newton's work during his lifetime. - Answers False
What is the force of gravity (in Newtons) acting between the Sun and a 1,500-kg rock
that is 2 AU from the Sun? - Answers 2.24
What is the force of gravity (in Newtons) acting between the Earth and a 5-kg
bowling ball that is resting on the surface of the Earth? - Answers 49.07
What is the semimajor axis (in AU) of a planet with an orbital period of 14 years? -
Answers 5.808
What is the semimajor axis (in AU) of a planet with an orbital period of 75 years? -
Answers 17.78
Kepler found that planets do not move in _______ but in ________. - Answers
circles, ellipses
The statement: "A planet's orbital period squared is equal to its semimajor axis
cubed." is also known as ... - Answers Kepler's Third Law
When Kepler began his work, which solar system model was able to make the most
accurate predictions? - Answers Copernicus' model
According to Newton's Law of Gravity, if two objects were to move twice as far
apart, the force of gravity between them would be... - Answers four times smaller
What is the orbital period (in years) of a planet with a semimajor axis of 35 AU? -
Answers 207.06
What is the force of gravity (in Newtons) acting between the Earth and a 125-kg
person standing on the surface of the Earth? - Answers 1226.68
The first proof that the Earth orbits the Sun was provided by... - Answers Galileo's
observation of the phases of Venus
