How Many Planets Are There In The Solar System? - Worldatlas.com

For most of human history, we could only see six planets. With Uranus and Neptune, the solar system grew to include eight planets. However, the story wasn’t over.

For most of human history, we could only see six planets: Mercury, Venus, Earth, Mars, Jupiter, and Saturn. The two outermost planets, Uranus and Neptune, were too far for early civilizations to see … [+6007 chars]

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