Mercury, First Planet From the Sun: Latest Discoveries
Mercury is our solar system's smallest planet.
Retired NASA spaceflyer Steven Hawley also discussed his own experiences.
The mystery of Mercury's weak magnetic field may be solved.
Don't miss the seven major planets of the solar system in the night sky this week.
From new ways to get to space to fiery death plunges into the sun, it was a busy week in space.
NASA's Dawn mission currently orbiting Vesta has revealed signs of differentiation - a process where dense materials sink to the center and less dense rise to the surface. This is a characteristic of a terrestrial planets such as our own.
New research suggests a giant asteroid may have knocked into Mercury and changed its spin.
From a comet diving into the sun to planets made of diamonds and more, it was a busy week in space.
The extension will keep Messenger in orbit around Mercury until March 2013.
The space rock apparently formed out of the same stuff that became Earth, Venus and Mercury.
NASA's Messenger probe has discovered some seriously weird stuff about planet Mercury.
The planet closest to the Sun has a magnetosphere like the Earth, but at its poles, the Sun's powerful force takes it toll by super charging sodium and oxygen particles and blasting them into space. NASA's MESSENGER probe weathers the storm.
NASA will announce the new Mercury discoveries at 2 p.m. EDT today.
Mercury is reaching its eastern most point in the night sky tonight.
Look for Mercury in the northwestern sky just after sunset between June 30 and July 10.
NASA's Messenger probe is already revealing intriguing new details about Mercury.
Each week we investigate lingering questions about cosmic objects. Now batting: Mercury.
Look to the skies this Memorial Day weekend to see four planets near the moon.
Over the next two weeks, the four brightest planets, Mercury, Venus, Mars, and Jupiter, perform a complex dance at dawn