Planets of Our Solar System MCQs with Answers

One-liner

Venus has the longest day in our solar system, taking about 243 Earth days to complete one rotation on its axis.

One-liner

Earth is the planet with the highest density in our solar system, at approximately 5.51 g/cm³.

One-liner

Venus is the hottest planet in our solar system, with surface temperatures reaching about 475°C due to its thick carbon dioxide atmosphere and runaway greenhouse effect.

One-liner

Mercury is the planet with the smallest diameter in our solar system, measuring approximately 4,879 km across.

One-liner

Celestial bodies that do not have their own heat and light are known as planets.

One-liner

Pluto is known to have ice-capped mountains, discovered by NASA's New Horizons mission in 2015.

One-liner

The heaviest planet in the solar system is Jupiter, with a mass more than twice that of all other planets combined.

One-liner

There are eight planets in the solar system.

One-liner

Jupiter is primarily composed of gases, mainly hydrogen and helium.

One-liner

Venus is considered the brightest planet in the solar system, often called the "Morning Star" or "Evening Star."