Celebrating scientists in the main control room appear on a video screen at the European Space Agency after the first unmanned spacecraft Philae landed on a comet called 67P/Churyumov-Gerasimenko, in  Darmstadt, Germany, Wednesday, Nov. 12, 2014. Europe's Rosetta space probe was launched in 2004 with the aim of studying the comet and learning more about the origins of the universe. (AP Photo/Michael Probst)

Photos: Spacecraft lands on comet

The European Space Agency celebrated a cosmic touchdown Wednesday by successfully landing a spacecraft on a comet.

Brad Paisley, from left, Steven Tyler and Carrie Underwood perform onstage at the 48th annual CMA Awards at the Bridgestone Arena on Wednesday, Nov. 5, 2014, in Nashville, Tenn. (Photo by Wade Payne/Invision/AP)

Photos: 48th annual CMA Awards

The 48th annual CMA Awards were held at the Bridgestone Arena on Wednesday, Nov. 5, 2014, in Nashville, Tenn.