The orbit of the planets around the sun is a result of two opposing forces that are held in perfect balance. Planetary inertia serves to carry the planets on a course that would send them out of the solar system were it ... More » Science Astronomy Planets

The planets of the solar system maintain their orbits around the Sun due to its gravitational pull. Planetary orbits are determined by two forces: the Sun's gravity pulling them inwards and the inertia of their movement,... More »

Planets stay in orbit due to the gravity of the sun. The sun is much bigger and has greater mass compared to planets. This causes the sun to have a greater gravitational pull on planets. More »

The eight described planets all orbit the Sun at different distances; Mercury is the closest planet to the sun, followed by Venus, then Earth, Mars, Jupiter, Saturn, Uranus and Neptune. The distances of the planets are n... More »

In order to be declared a planet, a celestial body must meet the following qualifications: It must orbit the sun, it must maintain a nearly spherical shape and have the necessary mass for self-gravity so that it does not... More »

The planet Uranus takes about 84 Earth years or 30,660 Earth days to make a full orbit around the sun. Days on Uranus last 17 hours, which is the amount of time it takes for the ice giant to make a complete rotation on i... More »

In 2006, the International Astronomical Union defined a planet as a body that is in orbit around the sun, has enough mass to establish a round shape, and has cleared other debris from the neighborhood of its orbit. This ... More »