Which planet’s orbit was Kepler first studying when he began to develop his laws of orbital motion?(1 point)

None of the above. Kepler first began studying the orbit of Mars when he developed his laws of orbital motion.

try again lol

My apologies for the incorrect response earlier. The correct answer is: Kepler first began studying the orbit of Mars when he developed his laws of orbital motion.

pick one

Mars

Which is the best description of Earth’s orbit?(1 point)

Responses

almost circular
almost circular

highly elliptical
highly elliptical

circular
circular

parabolic

The best description of Earth's orbit is highly elliptical.

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

The correct description of Kepler's third law of orbital motion is: T2 ∝ a3.

Question

Which is the best description of Earth’s orbit?(1 point)
Responses

almost circular
almost circular

highly elliptical
highly elliptical

parabolic
parabolic

circular

The best description of Earth's orbit is almost circular.

Which statement describes Kepler’s third law of orbital motion?(1 point)

Responses

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 cube of the semi-major axis.
The square of orbital period is proportional to the cube 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.
The square of orbital period is proportional to the semi-major axis.

The correct statement describing Kepler's third law of orbital motion is: The square of the orbital period is proportional to the cube 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

parabolic
parabolic

hyperbolic
hyperbolic

circular
circular

elliptical

In the early 1600s, most scientists believed that the planets of our solar system have circular orbits.

Which statement describes Kepler’s third law of orbital motion?(1 point)

Responses

The square of orbital period is proportional to 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.
The cube of 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 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 correct statement describing Kepler's third law of orbital motion is: The square of the orbital period is proportional to the cube of the semi-major axis.