2012 was an amazing year for space exploration. NASA has put together a great interactive infographic showing all of their accomplishments from the Mars Curiosity Rover to the GRAIL moon exploration. To check it out, click here!
Also, check out an amazing video of how the Hubble Telescope. Jannik Hansen from Google+ puts its best:
Imagine taking a picture of an empty area of space no bigger to you than a grain of sand held out at arms' length. Through enough exposure, however, Hubble revealed that this miniscule are of space holds a multitude of galaxies never seen before.