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.Know More
Mercury is the closest planet to the sun and has a shorter orbit than Earth. It rotates much slower, however, with each day lasting the equivalent to 58.65 Earth days.
The average distance to the sun is about 36 million miles, but this distance varies. Sometimes Mercury gets as close as 28 million miles from the sun while at other times it is 43 million miles away. This means that the orbit speed varies, depending on how close to the sun the planet is. Just before Mercury reaches its maximum orbit speed, that speed and its rotational speed become aligned. This gives the appearance of a static sun. Then, for a period of 8 days, Mercury orbits faster than it rotates. This makes it look as though the sun is going backwards in the sky.
Mercury's year is the shortest of all the planets in the solar system. Earth's is 365 days, while on Mars a year takes 687 Earth days. Neptune has the longest year. It takes more than 164 Earth years to orbit the sun.Learn more about Planets
The planet Mercury does not have any known moons (natural satellites) as of 2014. There has been one known artificial satellite orbiting Mercury, known as Messenger.Full Answer >
No one actually knows who found or discovered the planet Mercury. Since ancient times, man was aware of this and other planets because they were visible in the sky. For example, the ancient Babylonians, Greeks and Romans knew about this planet.Full Answer >
No one person discovered the planet Mercury. It has been observed for thousands of years, and although people might not have known what it was, they knew of its existence as early as 3000 B.C.Full Answer >
Mercury takes 87.97 Earth days to revolve around the sun, which is approximately one quarter of the length of a year on Earth. In contrast, it takes 59 Earth days for a single day to pass on Mercury.Full Answer >