Eco-friendly alternatives to fossil fuels are venturing beyond Earth—and into space.

The best, in fact, the only, candidate for this is the Nuclear Thermal Propulsion (NTP) system or nuclear rocket. First conceived of in 1945, this is a rocket that replaces burning chemical fuel ...

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If too much fuel or oxidizer builds up in the chamber, a rocket can blow itself to bits. Solid rocket boosters are sometimes used to give a rocket a little extra oomph at sea level. NASA's SLS ...

General Atomics Electromagnetic Systems (GA-EMS) just hit a massive milestone that could alter the future of space exploration. The company has successfully trialed a nuclear fuel that could one ...

The best candidate is the Nuclear Thermal Propulsion (NTP) system, a type of nuclear rocket. According to GA-EMS president Scott Forney, the company's latest nuclear fuel tests show that their fuel ...