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View Full Version : How Do We Know There’s a Planet 9?



Fraser
2016-Apr-22, 05:30 PM
Are you having trouble keeping track of all the planets in the Solar System? Good news! Astronomers have found evidence that there’s another huge planet far out in the Solar System. Textbooks will need to be rewritten again. You’re welcome.
The post How Do We Know There’s a Planet 9? (http://www.universetoday.com/128550/know-theres-planet-9/) appeared first on Universe Today (http://www.universetoday.com).


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