I supplied my article which reviewed the Quicklaunch, sea based hydrogen launch gun system. I note that Quicklaunch provides evidence that my nuclear cannon version of Project Orion has projectile configurations that would work.
Centauri Dreams talks about nuclear fusion powered spacecraft and the new Icarus interstellar spacecraft design project
Spacewriter ramblings discusses alien worlds in science fiction movies
Universe Today had an article on the NASA Puffin electric aircraft
We are all in the Gutter blog looks at weird objects that have been spotted by the Kepler Space Telescope.
Check out the Carnival of Space 138 at Nancy Atkinson's blog for more.