Comment on The Space Doctor’s Big IdeaparentComments−Jtsummers10yhttps://en.wikipedia.org/wiki/Vulcan_(hypothetical_planet)I believe this was posted recently, or linked like I'm doing now in a comment. Scientists in the 1800s tried to explain that 10% with a hypothetical 10th planet within Mercury's orbit.
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https://en.wikipedia.org/wiki/Vulcan_(hypothetical_planet)
I believe this was posted recently, or linked like I'm doing now in a comment. Scientists in the 1800s tried to explain that 10% with a hypothetical 10th planet within Mercury's orbit.