August 16, 20204 min read, 767 words
Published: August 16, 2020 | 4 min read, 767 words
Planet X has a long and storied history of non-existence. For about 130 years, astronomers have debated the existence of an additional planet or planets to explain discrepancies in the orbits of the known planets (mainly Neptune and Uranus). Later, the list of discrepancies was e...