Space Center Vs. Natural Science Museum

So I have a flight with a 11h stay in Houston, and I thought about what to do.

The both from the title came to my mind, but I only can comfortably visit one, which would you go for?

I am also open for alternative suggestions 🙂

Edit: Thank you all for the insight 🙂 I arrive at IAH and will probably visit the natural science museum ^{^}