Getting the date of an ancient date

There have recently been a few studies of the ancient world which have been aided by astronomy:

Dating Julius Caesar's invasion of Britain through tides (effects of the moon) 
http://www.txstate.edu/news/news_releases/news_archive/2008/06/Caesar062308.html

Dating Odysseus's Return from the Trojan War through a (suspected) Solar Eclipse
http://www.breitbart.com/article.php?id=2008-06-23_D91G27MO0&show_article=1&cat=breaking
http://www.sciam.com/article.cfm?id=homers-odyssey-may-document-eclipse

And Thale's eclipse which I blogged about before.

A lot of this stuff I get from Rogueclassicism.

-- Robert