Learn about Mercury's namesake, size, orbit, rotation, surface, atmosphere, and magnetosphere. Find out why Mercury is the hottest and coldest planet, and how it differs from Earth and other planets.

Learn about Mercury, the smallest and fastest planet in the solar system, with these facts. Discover its name, orbit, temperature, core, surface, and more.

Learn about Mercury, the smallest and fastest planet in our solar system. Find out how it looks, how it spins, what it is made of, and why it is so extreme.

Learn about Mercury, the smallest and innermost planet in the Solar System, with a highly elliptical orbit and a metal-rich core. Find out its physical characteristics, surface geology, magnetic field, orbit, rotation, observation history, and more.

Learn about Mercury, the smallest and fastest planet in our solar system, with no moons or rings. See images of its cratered surface, explore its atmosphere and history, and find out why it is not the hottest planet.

Learn about Mercury, the smallest and fastest planet in the solar system, from Britannica. Find out its history, orbit, surface, temperature, moons, and how it relates to relativity theory.

Learn about Mercury's name, temperature, composition, retrograde, potential for life and more. Find out how Mercury differs from Earth and Venus, and why it's the closest planet to the sun.

Learn about the smallest, fastest, and most elusive planet in our solar system. Find out how Mercury's orbit, surface, and history have been studied by NASA and ESA missions.

Learn about Mercury, the smallest and fastest planet in the Solar System, and its history of observation and exploration. Find out how Mercury's orbit, rotation, surface, atmosphere, magnetic field and more make it unique among the planets.