Mercury is the first planet from the Sun and the smallest in the Solar System. It is a rocky planet with a trace atmosphere and a surface gravity slightly higher than that of Mars.

Nov 29, 2025 · Mercury, the innermost planet of the solar system and the eighth in size and mass. Its closeness to the Sun and its smallness make it the most elusive of the planets visible to the unaided …

May 7, 2025 · Mercury Facts Mercury is the smallest planet in our solar system and the nearest to the Sun. Mercury is only slightly larger than Earth's Moon. It's the fastest planet, zipping around the Sun …

Nov 13, 2025 · Mercury has been a cooled molten rock for billions of years, and it is the only planet in our Solar System that is bare rock. Planet Mercury is named after the Roman god Mercury because …

Dec 3, 2025 · Explore the closest planet to the Sun! Find out how long a day on Mercury is and how many moons the planet has. Also, keep up with the upcoming Mercury events!

Jun 26, 2025 · Facts about the planet Mercury, including surface features, missions and the history of our relationship with the closest planet to the Sun.

Sep 25, 2025 · Mercury has been known since ancient times because it can be seen without advanced telescopes. Because it is so close to the Sun, Mercury is hard to study from Earth.

A transit of Mercury across the Sun takes place when the planet Mercury passes directly between the Sun and a superior planet. During a transit, Mercury appears as a tiny black dot moving across the …

Oct 21, 2025 · With a radius of about 2,440 km (1,516 miles), Mercury is the smallest major planet, smaller even than Jupiter’s largest moon, Ganymede, or Saturn’s largest moon, Titan. In addition, …

Apr 25, 2025 · Mercury is the smallest planet in our solar system and nearest to the Sun. It's only slightly larger than Earth's Moon. From the surface of Mercury, the Sun would appear more than three times …