Which is constant, the earth revolving around the sun ?

What remains constant when the earth revolves around the sun?

State in each case if the motion is one two or three dimensional. The earth revolving around the sun

A planet revolves around the sun with half as fast as the earth revolves around the sun. Determine its orbital size as compared to that of the earth.

Consider that the Earth is revolving around the Sun in a circular orbit with a period T. The area of the circular orbit is directly proportional to

Consider that the Earth is revolving around the Sun in a circular orbit with a period T. The area of the circular orbit is directly proportional to

What provides the centripetal force in the following cases earth revolving around the sun