How big is Venus compared to the Earth?
Venus is often called the Earth's sister planet. The Earth and Venus are very similar in size with only a 638 km difference in diameter, Venus having 81.5% of the Earth's mass.
Both the Earth and Venus are rocky planets, which means that they're effectively the same density (which can not be said of the Earth and, say, Neptune), and so they are also very nearly the same physical size. They also both have significant atmospheres surrounding their surfaces.
- Because it has always been easy to see, it's impossible to say who discovered Venus. In fact, after the Moon and the Sun, Venus is the brightest object in the sky – it's likely ancient people thousands of years ago knew about it. The first person to point a telescope at Venus was Galileo Galilei in 1610.
- From Earth, Venus can appear up to 47 degrees away from the Sun. During these times, when it rises or sets a few hours before or after the Sun, it can be seen just before sunrise or just after sunset as a bright morning or evening star.
- The equatorial diameter of Saturn is 120,536 km; that's about 9.5 times bigger than the diameter of the Earth. The surface area of Saturn is 83 times the area of Earth, and the volume is 764 times the volume of Earth. In other words, you could fit 764 planets the size of Earth inside Saturn.
Planets in our Solar system size comparison. Largest to smallest are pictured left to right, top to bottom: Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, Mercury.
- It depends upon how you define "coldest." With Pluto out of the race, the farthest "real" planet from the Sun is Neptune. Neptune and its neighbor, Uranus, are known as the "ice giants," since they are composed of huge amounts of rock and water, ammonia, and methane ice crystals.
- The smallest planet in our solar system is Mercury and the largest planet is Jupiter.
- Smallest Planet: Mercury. Mercury is a tiny black dot as it transits the Sun in 2006.
- Largest Planet: Jupiter. Damian Peach.
- Planet Size Comparison.
Venus has several times as many volcanoes as Earth, and it has 167 large volcanoes that are over 100 km (62 mi) across. The only volcanic complex of this size on Earth is the Big Island of Hawaii. This is not because Venus is more volcanically active than Earth, but because its crust is older.
- It's much colder there than anywhere on Earth, despite the fact Venus is closer to the sun. This discovery is a bizarre twist for a planet that is famously hot and inhospitable. Even though Venus is further from the sun, it's hotter than Mercury, the result of a killer greenhouse effect.
- The answer is no moons at all. That's right, Venus (and the planet Mercury) are the only two planets that don't have a single natural moon orbiting them. Figuring out why is one question keeping astronomers busy as they study the Solar System.
- Like all the planets, Venus formed approximately 4.6 billion years ago when the Sun and the Solar System came out of the solar nebula. So, the age of Venus is 4.6 billion years old.
Updated: 24th October 2018