1) The feeling people have after learning something amazing - describing not only a recognition of the beauty of something (such as the world), but the feeling of increased awe experienced after understanding the true complexity of it.
2) The combination of: "an artist's wonder at the virtuosity of nature with a scientist's understanding of how it comes to be." - author Matt Ridley (describing Richard Dawkins's "The Greatest Show on Earth").
Similar to "nerdvana."
Stephen: "Yes, you appeared to be in a state of considerable nerdvana."