Here's why:
* Orbital Speed: Mercury orbits the Sun at an average speed of 47.87 kilometers per second (29.78 miles per second).
* Orbital Period: Mercury's orbital period is only 88 Earth days, meaning it completes one orbit around the Sun much faster than any other planet.
This high speed is due to Mercury's close proximity to the Sun. The closer a planet is to the Sun, the stronger the Sun's gravitational pull, and the faster the planet needs to travel to maintain its orbit.
