NASA has observed that one day on Mercury is the equivalent of 59 days on Earth. A year on the planet, however, is only the length of 88 Earth days, since, at a distance of about 36 million miles, Mercury is the closest ... More » Science Astronomy Planets

A year on the planet Mercury is the equivalent of 87.97 Earth days. It orbits the sun approximately four times for every year on Earth. More » Science Astronomy Planets

The length of time it takes to get to Mercury depends on several factors, such as the speed of the spacecraft and how close Earth and Mercury are at the time of launch. The spacecraft New Horizon, which has a velocity of... More » Science Astronomy Space Travel

It takes a total 1407.5 hours, or 58.646 Earth days, for Mercury to make a complete rotation on its axis. A day on Earth is only 23.934 hours long, which pales in comparison to Mercury's extremely long days. Mercury make... More »

It takes Mercury 88 days to orbit the sun, in contrast to Earth, which takes 365 1/4 days. Early observers noticed how quickly it took to orbit, and so named the planet after the fleet-footed messenger of the gods. More » Science Astronomy Planets

The surface gravity on Mercury is 3.7 meters per second squared, which is 38 percent of the surface gravity on Earth. Surface gravity is typically measured in acceleration units. More »

According to Universe Today, when Mercury is at its closest point to Earth, it is approximately 48 million miles away, and at its farthest point, Mercury is approximately 138 million miles away from Earth. This differenc... More » Science Astronomy Planets