SOLAR SYSTEM

Detailed explanation-1: -Therefore the planet moves faster when it is nearer the Sun and slower when it is farther from the Sun. A planet moves with constantly changing speed as it moves about its orbit. The fastest a planet moves is at perihelion (closest) and the slowest is at aphelion (farthest).

Detailed explanation-2: -Some 4.5 billion years ago, our planet was around 50, 000 kilometers closer to the Sun than it is today, and will grow more distant more rapidly as the Sun continues to evolve. With each and every orbit that passes, the planets become progressively less tightly-bound to our Sun.

Detailed explanation-3: -According to the kepler’s second law, the angular momentum of a planet around the sun is constant. Thus a planet moves fast near the sun in order to cover longer distances.

Detailed explanation-4: -The second law (Law of areas): The radius vector drawn from the sun to the planet sweeps out equal areas in equal intervals of time.

Detailed explanation-5: -The strength of an object’s gravitational pull is proportional to how much mass it has. Because the sun is losing mass, its pull on Earth is weakening, leading our planet to drift away from our star by about 2.36 inches (6 centimeters) per year, DiGiorgio said.