If Earth takes one year to orbit the Sun, about how many years does it take Jupiter to complete one orbit (rounded to the nearest whole number)?

• 12

Which Kepler’s law links the square of a planet’s orbital period to the cube of its average distance from the Sun?

• First Law
• Second Law
• Third Law
• Fourth Law

According to Kepler's Second Law, when is a planet moving fastest in its orbit?

• When it is closest to the Sun
• When it is farthest from the Sun
• At all points the speed is the same
• When it's halfway through its orbit

What geometric shape did Kepler determine describes the orbit of planets around the Sun?

• ellipse

Do all planets move at the same speed around the Sun according to Kepler's laws?

Kepler's laws only apply to planets in our solar system.

Name the astronomer who formulated the three laws describing planetary motion.

• Johannes Kepler

According to Kepler's Third Law, what is the relationship between the time a planet takes to orbit the Sun and its distance from the Sun?

• The farther the planet, the shorter the orbit time.
• The time is unrelated to the distance.
• The farther the planet, the longer the orbit time.
• All planets take the same time to orbit the Sun.

Which of the following best describes Kepler's First Law?

• Planets move in straight lines around the Sun.
• Planets orbit the Sun in an elliptical path, with the Sun at one focus.
• Planets orbits are perfect circles around the Sun.
• The speed of planets in their orbits is always constant.

Kepler's Second Law is also known as the Law of Equal Areas.