Kepler also discovered a relationship between the time it
takes planets to orbit the Sun and their relative distances
from the Sun. The planetās orbital period (P ), is the time it takes to travel once around the Sun (in Earth years). A planetās semi-major axis (a) is its average distance from the Sun in AU. This relationship is known as Keplerās third law, and says that a planetās orbital period (P ) squared is proportional to the semi-major axis (a) cubed:
š! = š"
Is this a linear relationship? (Circle one) Yes No