Mercury, the diminutive planet closest to the Sun, was notoriously mysterious due to its difficulty to explore. That changed on March 18, 2011, when the MESSENGER spacecraft from Johns Hopkins ...

Mercury moves super fast around the Sun, finishing its year in just 88 Earth days. The planet has crazy temperature swings, ...

Here's some Mercury trivia to ponder while planet gazing. Skip to main content. Open menu Close menu. ... here are a few interesting facts about this rocky little world which you might not have ...

Our solar system's innermost planet is pretty weird. The dinky planet is approximately 3,030 miles (4,876 kilometers) in diameter, making it about as wide as the continental United States and only ...

Mercury retrograde may mean mishaps galore, ... Get Reader’s Digest’s Read Up newsletter for more zodiac insights, humor, travel, tech and fun facts all week long. What is Mercury retrograde?