Date: Sun, 10 Jul 2011 11:21:38 -0400 From: mark <whitroth at 5-cent.us> To: "gt-pfrc at ml.gt.org" <gt-pfrc at ml.gt.org>, WSFA Official List <wsfa-forum at yahoogroups.com>, WSFA members <WSFAlist at KeithLynch.net> Subject: [WSFA] Neptune's first orbit: a turning point in astronomy Reply-To: WSFA members <WSFAlist at KeithLynch.net> Excerpt: Astronomers will celebrate a remarkable event on 11 July. It will be exactly one year since the planet Neptune was discovered. Readers should = note a caveat, however. That year is a Neptunian one. The great icy world was first pinpointed 164.79 years ago =96 on 23 September 1846. And= as Neptune takes 164.79 Earthly years to circle the sun, it is only now completing its first full orbit since its detection by humans. Hence those anniversary celebrations. --- end excerpt --- <http://www.guardian.co.uk/science/2011/jul/10/neptune-orbit-anniversary-= astronomy> mark