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A comment on Is Planet Nine Alone in the Outer System?. Parent comment

Re:Is Planet Nine Alone in the Outer System? by globular-toast on Wednesday May 07, 2025 @02:58AM (#43912936)
"Planet X" was used before Pluto was discovered. The X didn't mean 10. In fact, Pluto was thought to be Planet X before they realised it was much, much smaller than that.
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Re:Is Planet Nine Alone in the Outer System? by yellowapple on Thursday May 08, 2025 @11:31PM (#43933563)
The people now calling it Planet 9 instead of Planet X, as in the article, evidently didn't get that memo.
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