HOAX! Of course this has to be a publicity stunt for something.
NASA Disinformation Campaign Launched By Avalon
October 3, 2013
A new website called RememberThe13th.com is claiming to be an announcement from NASA that on November 13, 2013, NASA will announce a ‘Major Discovery’ that will ‘Shake the World’. The interesting thing about this ‘announcement is that the site is not on NASA’s servers, which are offline due to the historic government shutdown, now in it’s third day.
The domain, RememberThe13th.com, according to DomainTools.com, was Creation date: 01 Oct 2013 16:16:00 
In NASA’s history of warnings, this one coming from namecheap.com appears to be the ultimate prank that will be difficult for NASA to refute given that their site NASA.gov is currently offline. Whether this is criminal fraud in causing alarm to potentially millions of people, remains to be seen. Its possible that desperate people are doing desperate things to attract attention and dupe people into some kind of commerce. . . . Read Complete Report
NASA To Have A BIG Announcement On November 13th : Hoax
According to rememberthe13th.com with alleged NASA logo :
“The Biggest Discovery That will shake the earth, It will never be the same again.”
So whats that all about? NASA has made a historic discovery that will shake the entire planet. This announcement will be released to the media on November 13th, 2013. It will be a day to remember and One for the history books. Spread the word to your family & friends and sign up to stay updated!
But after digging more, we come to conclusion that rememberthe13th.com website is a honey trap for email hacking.
Website domain is register with Namecheap.com and domain owner using privacy guard service to hide his identity. . . . Read Complete Report