The peak of the Geminid meteor shower is past - but only barely. If you watch late tonight or in the wee hours tomorrow, you should still see some meteors.
Earth didn't physically cross the plane of our Milky Way galaxy in 2012. But Earth did cross the galactic equator in 2012. That's something we do every year - twice.
In astronomy, X-rays look at interstellar gas heated to millions of degrees around extreme environments like black holes, neutron stars, and colliding galaxies.
Very Long Baseline Interferometry, or VLBI, links together widely separated radio telescopes to allow astronomers to see the universe in more detail than ever.