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How far apart are the planets?

1 cm : 3.5 kmEarth : distance to Neptune
Far enough that no honest diagram fits on a page. Shrink Earth to 1 cm: the Moon is 30 cm away, the Sun is 117 metres away, Mars at its closest is 43 m, and Neptune is 3.5 km from your centimetre-wide Earth.
Try 1:1 scale yourself
▶ Try 1:1 scale yourself

Why every poster lies to you

Textbook solar systems show planets shoulder-to-shoulder because the truth is un-drawable: the gaps between planets are thousands of times wider than the planets themselves. When Voyager 1 photographed Earth from 6 billion km away — the famous Pale Blue Dot — our whole world covered less than a single pixel, a "mote of dust suspended in a sunbeam".

Line up all eight planets side by side and they span 392,752 km. When the Moon is at its farthest from Earth, they would just squeeze into the gap between the two — with only a few thousand km to spare.

This site's 1:1 mode is the un-lied version: one scale for sizes and distances alike. The planets become sub-pixel specks on enormous orbit lines, and finding them takes real effort. That feeling — slightly lost, surrounded by nothing — is the most accurate model of the solar system you will ever experience. Try it.

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Facts verified July 2026

Every figure on this page is a real, rounded value checked against primary sources. Found something out of date? See how we keep it accurate.