Space questions, answered
What is the biggest planet in the Solar System?
Jupiter — about 143,000 km across, more than eleven Earths wide, and more massive than all the other planets combined.
Jupiter is a gas giant, so vast that around 1,300 Earths could fit inside it by volume. Its Great Red Spot alone is a storm wider than our whole planet, and it has been raging for at least a couple of centuries.
Saturn is the second largest, and the two of them together hold most of the mass of the Solar System that isn't in the Sun.
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People also ask
What is the smallest planet?
Mercury — only about 4,880 km across, barely larger than Earth's Moon.
Is the Sun bigger than Jupiter?
Far bigger — the Sun is about ten times Jupiter's diameter and holds 99.86% of the Solar System's mass.
Sources: NASA — Jupiter