Early in the Solar System's history, Mercury may have been struck by a planetesimal of approximately Mercury's mass and several thousand kilometers across. [44]

Jun 13, 2026 · Mercury has a radius of about 2,440 km, and its surface area is 74,797,000 km 2. Its mass is 3.30 × 10 23 kg. Mercury is the smallest major planet in both size and mass.

At 5.427 g/cm³, Mercury has the second largest density in the Solar System. It is only slightly denser than Earth. Its density is the biggest thing in common that Earth and Mercury share. Mercury’s mass …

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 …

5 days ago · 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.

May 7, 2025 · Explore a curated collection of resources about Mercury. These resources include activities that can be done at home, as well as videos and animations, images, and printable graphics.

Mercury, the smallest planet in our solar system, weighs in at a **mass of 3.3011 × 10²³ kilograms** (3.3011 trillion trillion kg). This might sound like a mind-boggling number, but it’s a precise …

The mass of the planets in order are Mercury, Mars, Venus, Earth, Uranus, Neptune, Saturn, and Jupiter. These masses of all planets are in order from lightest to heaviest. Mercury is the least …

Dec 15, 2015 · Our Solar System is a number of planets and other bodies that orbit the star we call the Sun (Sol). This table has information on the mass of the bodies in units of Solar Masses, Earth …

It has a mass of 1.9885 × 10³⁰ kg That’s about 333,000 times the mass of Earth —which makes sense, considering it accounts 99.86% of the total mass of the entire solar system.