Announcing the second annual Carl Sagan memorial blog-a-thon

Later this month, on December 20, 2007, we will reach the eleventh anniversary of Carl Sagan's passing — and the first anniversary of the wildly successful first-ever Carl Sagan Memorial Blog-a-Thon. Far exceeding my wildest expectations, this became a truly worldwide celebration, with more than 250 posts in 11 languages. And for those who like nice round anniversary numbers, this year also saw quite a number of significant Sagan-related ones: the tenth anniversary of the release of the film Contact and the Planet Walk in Ithaca, NY; and the thirtieth anniversary of the launch of the two Voyager spacecraft. I am launching a new blog-a-thon exactly a year after the first one; for full details, see the main announcement post on my personal blog. See you on the 20th!