Between Earth and Mercury can vary due to the elliptical nature of their orbits. When Mercury is at its closest point to Earth, known as perihelion, it can be as close as 29 million miles (47 million km) away. However, when Mercury is at its farthest point from Earth, known as aphelion, it can be as distant as 43 million miles (70 million km). These fluctuations in distance are due to the eccentricity of Mercury’s orbit, which means that its path around the Sun is not a perfect circle. Despite these variations, the average distance of 48 million miles (77 million km) provides a general idea of how far Mercury is from Earth on average. This celestial dance between our two planets, with their ever-changing distances, adds a fascinating dimension to the study of planetary motion and our understanding of our place in the vastness of the universe.