Which Planet In Our Solar System Has The Most Gravity?

A 3D rendering of Jupiter, the planet with the most gravity in the solar system.

The Planet With The Most Gravity

Our Solar System has eight planets which are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Out of all of these planets, Jupiter has the most gravity. In fact, the only object in the Solar System with a gravity larger than Jupiter is the Sun.

The gravitational force that an object exerts depends on three things; its density, mass, and size. Despite Jupiter having the third lowest density (1.33 grams per cubic centimeter), only behind Uranus (1.27) and Saturn (0.69), its stature as the largest planet in the Solar System in terms of both mass and size offsets this.

Jupiter has a mass of 1.898 x 10^27 kilograms (4.184 x 10^27 pounds) and is such a force that it has its own mass in astronomy called Jupiter Mass (aka Jovian Mass). To put this in greater perspective, Jupiter is around 2.5 times more massive than every planet in our Solar System combined.

Meanwhile, its diameter comes in at a massive 86,881.4 miles (139,822 kilometers). For comparison, it is much larger than second place Saturn at 72,367.4 miles (116,464 km) or our own home planet at 7,917.5 miles (12,742 km). Jupiter is large enough to fit any object in our Solar System inside itself, with the exceptions of Saturn and the Sun.

Jupiter's Gravity Compared To Other Objects In The Solar System

Earth's gravity is the standard that is used in science in order to calculate the gravity of other celestial bodies. The gravity of our planet is equal to 9.807 meters per second squared (32.18 feet per second squared). What this means in layman terms is that if something is held above the ground and then dropped, it will fall towards the surface at a speed around 9.8 meters for every second it is falling.

Knowing this information gives a better understanding of Jupiter's gravity, which is 24.79 m/s² (81.33 ft/s²). However, what is important to remember about Jupiter is that as a gas giant it does not have a true surface. It is thought that standing on the planet's 'surface' would just lead to one sinking until they reached its core. Therefore, Jupiter and other gas giants have their surface gravity defined by the force of gravity at their cloud tops.

For comparison, the other gas giants can't stack up to Jupiter gravity wise. Neptune comes in second at 11.15 m/s² (36.58 ft/s²) followed by Saturn at 10.44 m/s² (34.25 ft/s²) and Uranus at 8.69 m/s² (29.4 ft/s²). The rocky planets are also no match with Earth at 9.807 m/s², Venus at 8.87 m/s² (29.1 ft/s²), Mars at 3.711 m/s² (12.8 ft/s²) and Mercury at 3.7 m/s² (12.4 ft/s²). However, Jupiter has no chance against the Sun, which has a gravity of 274 m/s² (898.95 ft/s²).


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