A rare 'smiley face' triple conjunction is coming to Earth's morning skies on April 25, when Venus, Saturn and the crescent ...

Is the Best Time to Spot Mercury . In the early morning, Mercury will rise before the Sun and hang low in the east close to the horizon as the dawn sky slowly brighte ...

April’s planetary parade has fewer planets. Only four will line up: Venus, Saturn, Mercury and Neptune. April's parade of ...

For starters, planetary scientists finally know what the solar system’s innermost planet looks ... whether Mercury—with a molten iron core, like Earth—has volcanoes: It does, plenty of ...

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.

A new study indicates that Mercury's core-mantle boundary (CMB) may possess a diamond layer that extends up to 18 kilometers ...

Four of Earth’s neighbors are about to appear in a planetary alignment. Those four planets — Mercury, Venus, Neptune and ...

Starting tomorrow and continuing through April 25th, the planet Mercury will be visible to the naked eye in our sky.

Given the challenges of taking a detailed look at a ... its axis as it does to revolve around another body, just like our moon does as it orbits Earth. Or it could be like Mercury, says Jim ...

Meet the author: Dr. Phil Plait is an astronomer, author, and science communicator with a PhD in astronomy at the University ...