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Which planet has the longest rotation in the Solar System?
- Jupiter
- Venus
- Earth
- Pluto
It takes Venus longer to rotate once on its axis than to complete one orbit of the Sun. That’s 243 Earth days to rotate once – the longest rotation of any planet in the Solar System – and only 224.7 Earth days to complete an orbit of the Sun.
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Venus’s mean temperature is 462°C. What makes it so hot?
- It is close to the Sun
- There are many volcanoes
- There is a high concentration of carbon dioxide
- There is a high concentration of nitrogen
Its mean temperature is 462°C. This is because of the high concentration of carbon dioxide in Venus’ atmosphere, which works to produce an intense greenhouse effect. Heat is trapped in the atmosphere like a blanket, causing the temperature of the planet to be much higher than its proximity to the Sun would suggest.
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Venus is one of the two planets in the Solar system that spins clockwise. What is the reason for it?
- Venus was knocked off its upright position
- The Sun’s gravitational force affects it
- Venus’s high temperature makes it spin clockwise
- The friction between its core and mantle caused it to change direction
Almost all planets in the Solar System spin anti-clockwise on their axis and orbit the Sun in an anti-clockwise direction. Venus also orbits the Sun anti-clockwise but spins clockwise on its axis. One theory for this unusual rotation is that it was knocked off its upright position earlier in its history!
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