Which planet’s orbit was Kepler first studying when he began to develop his laws of orbital motion?(1 point)
Responses
Earth
Earth
Jupiter
Jupiter
Mars
Mars
Saturn
None of the above planets. Kepler's laws were developed by studying the orbit of Mars.
Which of these describes Kepler’s third law of orbital motion?(1 point)
Responses
T∝a2
T∝a2
T2∝a
T2∝a
T3 ∝a2
T3 ∝a2
T2 ∝ a3
T2 ∝ a3
Which statement describes Kepler’s third law of orbital motion?(1 point)
Responses
The cube of orbital period is proportional to the square of the semi-major axis.
The cube of orbital period is proportional to the square of the semi-major axis.
The square of orbital period is proportional to the cube of the semi-major axis.
The square of orbital period is proportional to the cube of the semi-major axis.
The orbital period is proportional to the square of the semi-major axis.
The orbital period is proportional to the square of the semi-major axis.
The square of orbital period is proportional to the semi-major axis.
The cube of orbital period is proportional to the square of the semi-major axis.
Which orbital shape did most scientists in the early 1600s think the planets of our solar system have?(1 point)
Responses
hyperbolic
hyperbolic
parabolic
parabolic
elliptical
elliptical
circular
circular
Which is the best description of Earth’s orbit?(1 point)
Responses
highly elliptical
highly elliptical
almost circular
almost circular
parabolic
parabolic
circular