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In 2017, NASA discovered and later confirmed the first interstellar object to enter our solar system. It wasn't aliens. But artist impressions of the object (called 'Oumuamua, the Hawaiian word ...
The way people think of the Solar System has changed many times throughout history. Before the development of the telescope, these ideas were based on what could be seen with the naked eye.
Scientists believe that they have discovered a new planet in the Earth's solar system, with NASA naming the finding 'Planet X' ...
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