Films

The Full History of Neptune: The Planet Found by Mathematics

Published Oct 21, 2026 · 29 min

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In 1612 Galileo drew the planet Neptune and almost certainly never knew it. In 1846 it was found with mathematics. This is the full history of Neptune: born closer to the Sun, it probably migrated outward and shaped the Kuiper Belt and Pluto's orbit; it may have stolen Triton, the big moon that orbits backwards; it has the fastest winds in the Solar System; and as of October 2026, Voyager 2's single flyby in 1989 is still our only visit.

Narration in this film is a synthetic, cloned voice. Sources and image credits are in the YouTube description.

Chapters

1. 0:00 Cold open: The Wrong-Way Moon
2. 1:05 The Full History of Neptune
3. 1:33 Born Closer In
4. 5:02 The Stolen Moon
5. 9:19 Wind on the Edge of the Dark
6. 15:25 Found With a Pen
7. 20:13 The Last Planet
8. 24:36 Nobody Is Going
9. 26:58 Closing: The Long Fall

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