If you know someone who thinks the world revolves around them, well, they’re partly correct. Gravity is a powerful force of nature, and it influences everything. It keeps you seated in your chair, the Moon in its orbit around Earth, and Earth in its orbit around the Sun. But the force works both ways. You also influence the Sun slightly.
How much exactly? A simple formula proposed hundreds of years ago can give you the answer.
Gravity is one of the four fundamental forces of
