Space Center is still open. Area is good to go and the vast majority of the damage is no close to the Space Center in Huntsville; there is some damage but nothing like Tuscaloosa and other places around the state.I live about 2 hours south of there and honestly for the money you can't go wrong with a visit to the World of Coca-Cola in Atlanta! But while there you need to see the aquarium in Atlanta as well. Its a family favorite for us to drive over and spend the day in Atlanta wandering around those places.
At the World of Coke....DO NOT ATTEMPT TO DRINK ALL THE FLAVORS AT THE LAST STATION! My oldest son did it last year and barely made it to the bathroom after trying some crap that Coca-Cola makes for Brazilians or some other South American nation. It was awful.
If you go to Atlanta, then you should definitly check out the park with the Granite mountain, they do a laser show, thats pretty kewl. I forgot the name of it, but while your there, its definitly a nice place to check out, and fairly cheap.
They used to be closed on Mondays from what I remember...or maybe that was just for a holiday time when we were going to take our boys up one day and looked it up before we left.Anyway here is the website for the US Space and Rocket Center...aka Marshall Space Flight Center.http://www.ussrc.com/