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Ukrainian astronomers discover an asteroid, called 2013 TV135, with the power of 2,500 nuclear bombs. It's officially described as "potentially hazardous." You've been warned.
Let's just say that the composers of '50s-era sci-fi soundtracks weren't all that wide of the mark.
The Cassini spacecraft has been gathering radar data on Titan, allowing scientists to knit together a dramatic view of its lakes and seas.
Earth is near the center of a tangled mass of potentially hazardous asteroids. But there's little to worry about.
Speaking at the Human to Mars Summit, NASA's top administrator, Charles Bolden, pledges to work to "prevent an asteroid from colliding with devastating force into our planet."
What happens when you stick six wannabe astronauts in crammed quarters in the middle of nowhere for months? A NASA-funded study seeks to find out.
Fiscal 2014 budget also seeks to give the U.S. the capacity to again send American crews to the International Space Station, without having to rely on foreign nations' space programs.
Researchers have now spotted more than 90 percent of the so-called "planet buster" asteroids in nearby orbits and none poses a threat to Earth. But thousands of midsize bodies remain to be found.
Kepler-186f orbits an M dwarf star in the constellation Cygnus. More importantly, it's the first confirmed Earth-size, potentially habitable planet elsewhere in the universe.