Which planet’s orbit was Kepler first studying when he began to develop his laws of orbital motion?(1 point)
Responses
Earth
Earth
Mars
Mars
Jupiter
Jupiter
Saturn
Saturn
Mars
Which is the best description of Earth’s orbit?(1 point)
Responses
circular
circular
parabolic
parabolic
almost circular
almost circular
highly elliptical
highly elliptical
almost circular
Which orbital shape did most scientists in the early 1600s think the planets of our solar system have?(1 point)
Responses
hyperbolic
hyperbolic
elliptical
elliptical
circular
circular
parabolic
circular
Which statement describes Kepler’s third law of orbital motion?(1 point)
Responses
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 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 semi-major axis.