Mercury is a strange little world. There are some craters on its surface that never see sunlight. It also has the most extreme temperatures of any planet in the solar system. Temperatures there can ...

Mercury has the shortest and fastest orbit around the Sun and experiences dramatic temperature changes as it rotates. It is a world of extremes. Explore facts about our solar system's fastest planet.

Until fairly recently, when we needed to know the temperature precisely, reliably, and over a wide range we used mercury thermometers. The devices themselves were marvels of instrumentation ...

Mention the word “mercury” and one of two things comes to mind: the silvery metal that is liquid at normal temperatures, or ...

Much closer to the horizon and a distinct reddish color, the planet Mercury isn’t on most people’s observing lists. In fact, a professional astronomer last year told me it was impossible to ...

Mercury is a strange little world ... It also has the most extreme temperatures of any planet in the solar system. Temperatures there can range from minus 300 degrees Fahrenheit (minus 184 ...