Jupiter is so big, it doesn't technically orbit the sun. Here's how.
Jupiter, our solar system’s fifth planet from the Sun, the massive gas giant protecting Earth and the inner planets from potential catastrophic comet and asteroid strikes, is far more unique than you’ve ever imagined.
The gas giant is so huge that it doesn’t orbit around the Sun. Jupiter is 2.5 times the mass of ALL other planets in our solar system combined.
This means that it’s so freakishly large that the center of Gravity between the gas giant and the Sun does not reside within the Sun, but a point in space, located just above our Sun’s surface. And there’s a perfectly rational explanation for that. When a smaller object orbits a bigger one, the smaller body does not travel around the larger one in a circle. Instead, both these objects orbit a ‘shared’ center of Gravity, which means they meet somewhere in a perfect center.
But Jupiter is special.
Because the gas giant is so hefty, its center of mass with the Sun lies exactly 1.07 solar radii from the center of the Sun– 7% of a sun radius over the surface of the Sun.
And this (not to scale) GIF from NASA explains the effect:
The gas giant is so large (estimated at approximately 143,000 kilometers wide) that it could devour all known planets in our solar system.
In fact, around 1,300 Earths can fit inside the gas giant.
Our planet’s center of Gravity resides so near to the center of the Sun that this effect is negligible. As a result, the larger object (the Sun) doesn’t seem to move, while the smaller object (Earth) orbits around it.
The same can be said about all other planets in our solar system, like Mercury, Venus, and even Saturn; their centers of mass with the Sun are located deep inside the Sun itself.
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