Early in the Solar System's history, Mercury may have been struck by a planetesimal of approximately 1⁄6 Mercury's mass and several thousand kilometers across. [44]

Nov 29, 2025 · 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.

3 days ago · Yet Mercury is the second densest planet in our Solar System after Earth due to a large, metallic core that accounts for the majority of its mass.

Nov 5, 2008 · Equatorial surface gravity values were computed from updated mass and equatorial radius values. Escape velocities were also updated based on computed values using updated …

Mar 27, 2025 · Mercury’s mass is 3.3010 x 10^23 kg (7.28 x 10^22 lbs), 20 times less massive than Earth. Mercury’s size is smaller when compared to other celestial bodies in the solar system.

NASA Goddard Planetary Fact Sheet.

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 …

Among the four inner Solar System planets, Mercury is the smallest and very dense, its vast iron core dominating its internal structure.

The mass of Mercury in kg is approximately 3.30e+23 kg, which is 18.09× less than Earth's mass. This substantial mass creates a significant gravitational field that influences everything from …

The mass of the planet Mercury is approximately 3.285 × 10 23 kg. This is only 6% of Earth's mass.