Henry Spencer wrote:
No, what quickly settled Pluto's axial tilt was the discovery of
Charon (Pluto's moon) in the early 1980s.

Keith F. Lynch ) wrote:
1978.

Eric Chomko wrote:
What came fisr the discovery of Neptune's rings or Pluto's moon?

Pluto's moon. Neptune's rings were first detected by a stellar
occultation in 1983. And were confirmed by Voyager 2 in 1989.

Since 1989, Pluto has been the only planet in our solar system never
to have been visited by a probe.
--
Keith F. Lynch - - http://keithlynch.net/
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