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Space Explorers β˜…β˜†β˜† Easy

πŸͺ Planet Size Explorer β€” Solar System Scale

Compare the true sizes of all 8 planets and the Sun on a real scale. Click any planet to see its diameter, mass, gravity, and distance from the Sun. How many Earths fit inside Jupiter? Find out!

Selected: β€” Diameter: β€” vs Earth: β€” Earths fit inside: β€”

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The solar system contains 8 planets orbiting the Sun. Sizes vary enormously β€” Jupiter is 11Γ— Earth's diameter, while Mercury is only 0.38Γ—. The Sun itself is 109Γ— wider than Earth.

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The Physics

Planet radii span from Mercury (2439 km) to Jupiter (71492 km) β€” a factor of 29Γ—. The Sun's radius (696000 km) dwarfs all planets. Scale model: if Earth = 1 cm, Sun = 109 cm, Jupiter = 11 cm. Distances: if Earth = 1 AU, Neptune = 30 AU. Volume scales as rΒ³: Jupiter's volume fits 1321 Earths.