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

1978.

I'll pick up my T-shirt at Noreascon.
--
Keith F. Lynch - - http://keithlynch.net/
I always welcome replies to my e-mail, postings, and web pages, but
unsolicited bulk e-mail (spam) is not acceptable. Please do not send me
HTML, "rich text," or attachments, as all such email is discarded unread.