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.

Jan 6, 2026 · 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 …

Apr 25, 2025 · Mercury formed about 4.5 billion years ago when gravity pulled swirling gas and dust together to form this small planet nearest the Sun. Like its fellow terrestrial planets, Mercury has a …

Dec 24, 2025 · Mercury is the smallest planet in the Solar System in both mass and diameter. It’s 18 times less massive than the Earth, and its diameter barely reaches two-fifths of the Earth’s size.

Mar 26, 2024 · Get facts about the planet Mercury. Learn about its orbit, temperature extremes, and atmosphere. Discover whether life on Mercury is likely.

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 …

Mercury is the smallest planet in the Solar System and the closest one to the Sun. It's also a little-explored world, full of mystery, with a surface split into extremes and an interior that puzzles …

Mercury is one of the five classical planets visible with the naked eye and is named after the swift-footed Roman messenger god. It is not known exactly when the planet was first discovered - although it was …

Mercury is the closest planet to the Sun. It completes each orbit around our nearest star in just 88 days, and its distance from the Sun varies from 46 to almost 70 million km.

Mercury is the closest planet to the Sun, and the smallest planet in the solar system. It has a large iron core that accounts for about three-quarters of its mass.