The planet which exerts the greatest gravitational force on the Earth is Jupiter. It is not only the planet with the strongest pull but it is also the one with the largest mass. It is so massive and has such a strong gravitational pull, it likely prevented the formation of a planet between itself and Mars in the region known as the asteroid belt.

While Jupiter exerts the greatest gravitational pull on the Earth, scientists have discovered something else of big significance. Jupiter's gravitational pull is only 0.0000068 times the gravitational pull of the moon. Of the nine planets in our solar system, Jupiter is the largest and is part of a group known as the gas giants. It is the fifth planet from the Sun, with an orbit of around 500 million miles, which it covers in just under 12 Earth years.

A day on Jupiter would last approximately 10 Earth hours long. As it is one of the brightest bodies in the night sky, Jupiter was discovered in Ancient times, and since that time 50 moons have been discovered orbiting the planet. The four largest ones were discovered by Galileo and named Io, Europa, Ganymede, and Callisto.

The diameter of Jupiter is 10 times larger than that of Earth, and it has 300 times Earth's mass. The mass of Jupiter is actually more than twice the total mass of all the other planets in the solar system, but it still has just one-thousandth of the mass of the Sun. However, because the planet is made of gases, it is only a little more dense than water.

More Info: sciencing.com