Surely we technically found the first Planet 9 back in 1930. We called it Pluto. It was, of course, downgraded in 2006, leaving us with the present eight planets.
If they do find a new Planet 9, they should choose a name beginning with P to keep the old mnemonics intact! 🔭🪐 #Astronomy
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We may have found the first direct evidence of a ninth major planet in the Solar System — BBC Sky at Night Magazine
Planet 9 is the hypothetical ninth planet in our Solar System. Has it finally been found? October 5, 2026 Suggestions of a ninth planet in our Solar System have been rumbling on for years now. Some as...
