Astronauts and cosmonauts honor 'Star Wars' by donning Jedi robes in a wacky new mission poster for the crew of Expedition 45. Why the Force is with them.

Until Virgin Galatic is live, however, real space tourism is still just a dream. Taking in these breathtaking posters will have to do for now. And if you want more options/more beautiful art ...

The European Planck Space Observatory revealed the universe is older than thought: 13.82 billion years old. See the role of the Cosmic Microwave Background here.