Thus, the retrograde motion of Mercury is nothing more than a perception from Earth, with no physical impact on our planet or its inhabitants," he said. According to Academician Bisikalo ...

In appearance it is similar to Earth's Moon. The planet is terrestrial, meaning that it has a solid surface and is mainly made of silicate rocks or metals. The planet Mercury is mainly made up of iron ...

Mercury ' s inner core is solid and about the same size as Earth ' s inner core, a new study using observations from NASA's MESSENGER mission has indicated. Mercury is the smallest planet in our ...