Associazione dell'Orsa Maggiore: differenze tra le versioni

Versione delle 03:21, 14 feb 2013

Versione delle 17:24, 18 set 2013

Riga 216:

==Collegamenti esterni==

* [http://web.archive.org/web/19991007030946/http://seds.lpl.arizona.edu/messier/xtra/ngc/uma-cl.html] Arizona University website

* [http://www.kencroswell.com/DescendantsOfTheDipper.html] [[Ken Croswell]]'s astronomy website.

*LeDrew, Glenn (1998). [http://ottawa.rasc.ca/observers/an9803p4.html "AstroNotes: The Ursa Major Moving Cluster"]. Retrieved July 28, 2005.