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🪐 KNOW PRIMARY · AGES 6–11

PLANETS &
ASTRONOMY

🔭 Telescopes, Math, and a Farm-Boy Astronomer!

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1781
Herschel finds Uranus
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1846
Math predicts Neptune
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1930
Tombaugh finds Pluto
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TODAY
Robots visit worlds
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✨
FUTURE
More worlds await
🔭 OUTER DISCOVERIES
TOPIC 20 · PLANETS & ASTRONOMY · THE SOLAR SYSTEM
PAGE 1 OF 5 — BEYOND SATURN
FARTHER OUT
Comic panel about how we discovered the outer planets: Farther Out, educational kids illustration
THE SKY HELD SECRETS
For thousands of years, people knew only the planets visible to the naked eye: Mercury, Venus, Mars, Jupiter, and Saturn, plus Earth. Then telescopes opened the outer solar system. Uranus, Neptune, and once Pluto were found one by one, each discovery stretching our map of space. Finding a new planet was one of the greatest prizes in science. It meant the solar system was bigger and stranger than ancient sky-watchers imagined.
👁️ NAKED EYE
Five planets plus Earth were known before telescopes revealed Uranus and the worlds beyond Saturn.
MORE!
MAP
Comic panel about how we discovered the outer planets: The Sky Held Secrets, Map, educational kids illustration
🗺️ Solar system grew wider
🔭 Telescopes changed everything
PRIZE
Comic panel about how we discovered the outer planets: Prize, educational kids illustration
🏆 New planets made headlines
🌌 Sky still had surprises
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