Interactive Solar System Quiz

In our solar system, Mercury and Venus are the only planets without moons.

Ceres is the largest object in the asteroid belt between Mars and Jupiter and is classified as a dwarf planet.

Venus is the only planet in our solar system with a day longer than its year. It takes 243 Earth days for Venus to rotate once on its axis, but only 224.7 Earth days to orbit the Sun. This means a day on Venus is almost 20 Earth days longer than its year.

Jupiter has the shortest day of any planet in the solar system, completing one rotation in about 10 hours.

The planet with the highest surface temperature in our solar system is Venus. The greenhouse effect caused by the thick atmosphere of Venus causes the heat to remain trapped raising the surface temperature to around 467 degrees Celsius.

Mars hosts the largest volcano in the solar system, Olympus Mons. This volcano is approximately 22 kilometres high, nearly three times the height of Mount Everest, and spans about 600 kilometres in diameter.

Ganymede, a moon of Jupiter, is the largest moon in our solar system. With a diameter of about 5,268 kilometres, it is even larger than the planet Mercury.

Mars has two moons: Phobos and Deimos. Phobos, the larger moon, orbits closer to Mars, only about 6,000 kilometres above its surface, making it one of the closest orbits of any moon in the solar system.

Mercury has the shortest year of any planet in our solar system, completing one orbit around the Sun in about 88 Earth days.

Venus has a diameter of about 12,104 kilometres, making it nearly similar in size to Earth. Earth's diameter is approximately 12,742 kilometres.