Alpha Centauri sits more than four light-years away, close enough to fascinate generations of dreamers and far enough to make ...

Christopher Nolan's 2014 sci-fi film Interstellar was adventurous, philosophical, and poetic, and it was a story that came with a warning. One of the most profound moments in Interstellar is a scene ...

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In the summer of 2012, the 1,592-pound space probe Voyager 1 became the first man-made object to exit our solar system. NASA had launched the probe in 1977; the multi-billion-mile trek to the edge of ...

A potential spacecraft called Icarus Pathfinder would be powered by VASIMR engines, taking it out to 1,000 AU (1AU is the distance between the Earth and sun). Obtaining the exotic fuels needed for ...