Bone and muscle deterioration, radiation exposure, vision impairment -- these are just a few of the challenges space travelers face on long-duration missions, even before considering the psychological ...

Bone and muscle deterioration, radiation exposure, vision impairment -- these are just a few of the challenges space travelers face on long-duration missions, even before considering the ...

Powering spacecraft with solar energy may not seem ... RTGs are essentially nuclear-powered batteries. But unlike the AAA batteries in your TV remote, RTGs can provide power for decades while ...

NASA uses pi on a daily basis. It’s key to calculating orbits, the positions of planets and other celestial bodies, elements of rocket propulsion, spacecraft communication and even the correct ...

On the 13th (local time), U.S. President Donald Trump referred to North Korean Commissioner Kim Jong-un as a "Nuclear Power" and said that North Korea "has a lot of nuclear weapons," raising ...