NASA’s push for a new nuclear rocket engine is not just another upgrade to the hardware we strap to the bottom of spacecraft.

NASA is backing a new generation of nuclear rockets that could compress the months-long journey to Mars into a sprint ...

The future of American leadership in space will hinge on one factor: the ability to generate high power on orbit and on the surface of celestial bodies such as the moon. From a physics standpoint, ...

As Russia threatens atomic attacks on Ukraine and its Western allies, and prototypes a nuclear-armed spacecraft, space powers across Europe are racing to defend against nuclear strikes in orbit.

WASHINGTON — Nuclear power startup Antares announced a $96 million Series B round Dec. 2 to fund work on developing small nuclear reactors, including for space applications. The company said the ...