Venus (Planet) — Facts, Moons, Atmosphere, and Exploration
Venus is Earth-sized but radically different in climate. Its thick carbon dioxide atmosphere traps heat so efficiently that the surface is hotter than Mercury, even though Venus is farther from the Sun.
Quick Facts
| Planet type | Terrestrial (rocky) |
|---|---|
| Mean radius | 6,052 km |
| Mass | 4.87 × 10^24 kg |
| Gravity | 8.9 m/s² |
| Average temperature | 464°C |
| Length of day | 243 Earth days (retrograde) |
| Length of year | 225 Earth days |
| Number of moons | 0 |
| Rings | No |
| Distance from Sun (AU) | 0.72 |
What Makes Venus Unique
Venus spins in the opposite direction of most planets, so the Sun appears to rise in the west and set in the east. It is also one of the brightest objects in our sky due to thick clouds that reflect sunlight.
The pressure at the surface is about 90 times Earth's sea-level pressure. That extreme environment helps scientists understand greenhouse effects and long-term climate evolution.
Atmosphere and Weather
Venus has a deep carbon dioxide atmosphere with sulfuric acid clouds high above the surface. Fast winds race through upper cloud layers, while near the ground the air is dense and superheated.
Unlike Earth, the greenhouse effect on Venus is extreme and stable over long timescales. Studying this planet gives context for how atmospheres can evolve under different conditions.
Moons and Rings
No known moons or rings orbit Venus. It is one of only two planets in our Solar System with zero moons, alongside Mercury.
Exploration Highlights
Soviet Venera probes achieved historic surface landings and returned images from Venus. Orbital missions such as Magellan mapped the surface with radar, revealing volcanoes and tectonic features. Current and future missions focus on atmosphere chemistry, cloud layers, and geological history.
If You Like Venus
Next, compare Venus with Earth to see how two similar-sized planets can diverge, read Mercury for another inner planet, and visit Mars for a much thinner atmosphere.
Is Venus a Gas Planet?
No, Venus is not a gas planet. Venus is a terrestrial planet, which means it is a rocky world with a solid surface like Mercury, Earth, and Mars.
How Many Moons Does Venus Have?
Venus has no moons. Along with Mercury, it is one of the only planets in the Solar System that does not have a natural satellite.
Climate of Venus
Venus has an extreme climate. Its thick carbon dioxide atmosphere traps heat through a powerful greenhouse effect, pushing surface temperatures to about 464 degrees Celsius. High clouds of sulfuric acid surround the planet, and the pressure at the surface is crushing compared with Earth.
If you want a broader, non-graphic explanation of entering harsh planetary environments, continue with What Would Happen If You Fell Into Each Planet?. Venus is one of the strongest examples of how atmosphere and pressure control the experience.
Venus Radius and Size
Venus has an approximate mean radius of 6,052 kilometers. That makes it slightly smaller than Earth, which is why the two planets are often compared in size even though their climates are very different.
FAQ
Why is Venus hotter than Mercury?
Mercury lacks a thick atmosphere, but Venus has a dense greenhouse atmosphere that traps heat very effectively.
Could people walk on Venus with a spacesuit?
Not safely with ordinary suit technology because of crushing pressure, intense heat, and corrosive atmospheric chemistry.
Does Venus have volcanoes?
Yes, Venus has many volcanic structures, and scientists continue to study signs of possible recent activity.
Is Venus a gas planet?
No. Venus is a terrestrial planet with a rocky surface.
How many moons does Venus have?
Venus has no moons.
What is the climate of Venus?
Venus is extremely hot, with a thick atmosphere and a runaway greenhouse effect that traps heat.
What is the radius of Venus?
The mean radius of Venus is about 6,052 kilometers, which is slightly smaller than Earth's.