NASA’s push for a new nuclear rocket engine is not just another upgrade to the hardware we strap to the bottom of spacecraft. It is an attempt to rewrite the basic rules of how far, how fast, and how ...

Scientists have proposed two experimental spacecraft that could reach one of the farthest known objects in the solar system in as little as seven years. The team of researchers, from Italy, believes ...

Over the past decade, a U.K.-based nuclear propulsion startup has been working behind the scenes to develop a fusion rocket that could cut flight time to Mars in half. This week, it unveiled the ...