Mercury

Mercury will cross the sun's face next Monday (May 9) in a rare "transit" that will be visible from most places on Earth, weather permitting. Read all about the skywatching event here.

On Monday (May 9), you will have an opportunity to witness one of the rarest astronomical events: a transit of Mercury across the face of the sun. Here's what to expect.

Would-be moon explorers are eager to learn better tactics for tracking down ice, which they hope to turn into water and rocket fuel — and new research may have found a new key to spotting buried ice.

If there ever was a planet that I feel has gotten a bad rap for its inability to be readily observed, it would have to be Mercury, known in many circles as the "elusive planet."

A solid metallic core nearly as large as Earth's might be lurking deep within the solar system's smallest planet.

Mercury shares its orbit with a ring of wandering dust, and a cloud of as-yet-undiscovered asteroids likely gave rise to a similar ring in Venus' neighborhood, recent research suggests.

Once again, it is time to seek out what has often been called the most difficult of the five brightest naked-eye planets to see: Mercury.