I’m just going to warn you, this is a controversial topic. Some people get pretty grumpy when you ask: how many planets are in the Solar System? Is it eight, ten, or more?
I promise you this, though, we’re never going back to nine planets ever.
When many of us grew up, there were nine planets in the Solar System. It was like a fixed point in our brains.
As kids, memorizing this list was an early right of passage of nerd pride: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.
But then in 2005, Mike Brown discovered Eris, an icy object thought to be about the same size as Pluto, out beyond its orbit.
Solar System Exploration.
Eight planets facts The eight planets of our solar system.
How Many Planets are in the Solar System Universe Today.
The Nine Planets Solar System Tour.
Solar system Define Solar system at Dictionarycom.
Our Solar System A Photo Tour of the Planets Spacecom.
The Solar System Planets in Our Solar System Pictures.
PLANET X NEWS - PLANETARY OBJECTS HIDING IN THE CLOUDS - 5:49
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