Question

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

circular
circular

highly elliptical
highly elliptical

parabolic

Answer 1

Which statement describes Kepler’s third law of orbital motion?(1 point)
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 square of orbital period is proportional to the cube of the semi-major axis.

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

Answer 2

almost circular

Answer 3

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