Venus' radius = 0.95 of Earth's
Venus' mass = 0.815 of Earth's
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Venus has a radius of 6,051.8 kilometers, which is about 95% of Earth's radius. In terms of mass, Venus has about 81.5% of Earth's mass.
The mean radius is close to that of earth's: 0.902 that of earth. The volume of Venus is 0.857 that of earth, and the mass is 0.815 that of earth.
Venus' gravity is about 91% of Earth's gravity, which means that objects on Venus weigh about 91% of what they would weigh on Earth. This is due to Venus having a similar mass to Earth but a slightly smaller radius.
Venus is the planet closest in mass to Earth, with a mass about 81% that of Earth.
Mercury is much smaller and less massive than Earth. Mercury has a radius of about 1,516 miles (2,440 km) compared to Earth's radius of about 3,959 miles (6,371 km). Mercury's mass is about 0.055 times that of Earth.
No, Mars has a greater mass than Venus. Mars has a mass of about 0.107 times that of Earth, while Venus has a mass of about 0.815 times that of Earth.