Europa is an interesting pick because of the existence of water, but his suggestion to use a radioactive ball to melt through the ice was new to me. Is this a common answer for "how" to go about getting to the water or is Tyson just improving?

I think a manned mission to #mars would be my pick. Seeing humans step foot on another planet and return safely, even if over a 5-10 year span, would do wonders for our space program and for the world at larges appetite for funding such projects.

Also, if you are interested in hearing some of the Hubski community talk about their passions for space, check out the tngpodcast/Hubski podcast/videocast on space