One of the planets has the least density among all the planets. The planet is
- ((a))
Jupiter
- ((b))
Saturn
- ((c))
Uranus
- ((d))
Neptune
Show Answer
Saturn
Concept:
- The order of the planets in the solar system starting nearest the sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.

- All the planets orbit the sun in a counter-clockwise direction and rotate on their axis west to east, except Venus and Uranus.
- Venus and Uranus rotate clockwise east to west while Uranus rolls on its side as it orbits the sun.
Explanation:
Saturn:
- Saturn is very large and is the second largest planet in the Solar System.
- Saturn is mainly composed of the lightest two gases known, hydrogen and helium.
- It is the only planet in our solar system whose density is less than water.
- The least dense planet in the Solar System is Saturn, which has an average density of only 687 kg/m3. (0.687 grams per cubic centimeter)
Therefore, the correct answer is Saturn.

Key Points
- Earth has the highest density in the Solar System which has a density of 5.514 g/cm3.
- Venus is the hottest planet in the solar system.
- Sun is not a planet is a star at the center of the solar system.
- Jupiter is the 5th planet from the sun and the largest planet in the solar system.
- Mars is called the red planet because it appears in the sky as a red star, and also its surface is covered with fine sand & dust full of iron oxide.





















































