It's hard to believe there's anything that astronauts can't do.

But for many people in NASA's orbit, Jason Townsend is the go-to guy for guidance on tweeting, hanging out on Google+, and friending on Facebook.

And yes, he's very familiar with the pipes of Canadian astronaut Chris Hadfield. Townsend says Hadfield's social space adventures have been "awe-inspiring"--and he shares how NASA's astronauts are following in Hadfield's gravity-free footsteps.