What Is the Biggest Planet in the Solar System?
Question
What is the biggest planet in the Solar System?
A. Earth
B. Mars
C. Jupiter
D. Saturn
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Correct Answer
Answer: C – Jupiter
Jupiter is the biggest planet in our Solar System. It is much larger than Earth and all the other planets that orbit the Sun.
Let's Understand
Our Solar System has eight planets. They travel around the Sun in their own paths, called orbits.
The planets are different in size. Some planets, such as Mercury and Mars, are relatively small. Others, such as Saturn and Jupiter, are much larger.
Jupiter is the largest of all eight planets.
Jupiter is so enormous that its diameter is about 11 times the diameter of Earth. Diameter means the distance across a round object through its center.
Jupiter is known as a gas giant because it is made mostly of gases, especially hydrogen and helium. Unlike Earth, Jupiter does not have a solid surface that we could walk on.
A Simple Example
Imagine Earth is a small ball with a diameter of about 1 centimetre. If Jupiter were made to the same scale, it would be about 11 centimetres wide.
That means Jupiter would look much bigger than Earth!
Jupiter is also famous for a huge storm called the Great Red Spot. This storm has been observed for hundreds of years.
What About the Other Answers?
| Option | Answer | Explanation |
|---|---|---|
| A | Earth — Incorrect | Earth is our home planet, but it is much smaller than Jupiter. |
| B | Mars — Incorrect | Mars is known as the Red Planet. It is much smaller than Jupiter. |
| C | Jupiter — Correct | Jupiter is the largest planet in the Solar System. |
| D | Saturn — Incorrect | Saturn is the second-largest planet and is famous for its beautiful rings. |
Did You Know?
Jupiter is enormous: More than 1,300 Earths could fit inside Jupiter by volume, although the exact number depends on how the planets are compared.
Jupiter has a giant storm: The Great Red Spot is a huge storm in Jupiter's atmosphere. It has been observed for hundreds of years.
Jupiter has many moons: Scientists have discovered many moons orbiting Jupiter. Some are covered with ice, while others have volcanoes.
Jupiter has faint rings: Saturn is famous for its rings, but Jupiter also has a ring system. Its rings are much fainter and harder to see.
A Simple Example
Think about a classroom containing balls of different sizes. There might be a small tennis ball, a football, and a very large exercise ball.
If Jupiter, Earth, Mars, and Saturn were represented by balls of different sizes, Jupiter would need the biggest ball.
This is a simple way to remember that Jupiter is the largest planet in our Solar System.
Think About It
Jupiter is the biggest planet in the Solar System. Why do you think Earth is much better suited for human life than Jupiter?
Quick Recap
| What We Learned | Simple Explanation |
|---|---|
| Biggest planet | Jupiter is the largest planet in the Solar System. |
| Jupiter's size | Its diameter is about 11 times Earth's diameter. |
| Type of planet | Jupiter is a gas giant made mostly of hydrogen and helium. |
| Famous feature | The Great Red Spot is a giant storm on Jupiter. |
| Saturn's size | Saturn is the second-largest planet in the Solar System. |

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