Earth's Orbital Revolution: A Countless Journey Around the Sun

The planets in our solar system have been orbiting the sun for billions of years. While their orbits have remained largely stable, their number of trips around the sun varies. Earth, for example, has completed roughly 4.5 billion orbits since its formation. Mercury, with its shorter year, has completed around 18.7 billion orbits, while Neptune, with its longer year, has completed only about 27.9 million orbits. The other planets fall somewhere in between. However, in about 4.5 billion years, the sun will expand and destroy Mercury, Venus, and Earth, potentially altering the orbits of the remaining planets.