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.

But of these planets, which is nearest to the sun? 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 ...

You'll be able to easily see four planets in the February evening sky ... Finally, during the last week of February, Mercury and Saturn will pass each other, low in the western evening twilight.

Gemini is ruled by Mercury, the planet of communication and intelligence. Gemini people have a special strength that helps them deal with life's challenges easily. Gemini's biggest strength is ...