A byproduct of aging nuclear weapons stockpiles could help power spacecraft on missions lasting decades. Americium-241, an ...

In astronomy, larger distances are both a blessing and a curse. They can cause issues like longer communication times, which also requires more powerful equipment, and positioning uncertainty that can ...

This screenshot from CCTV (China Central Television) shows China’s first moon rover Yutu, or Jade Rabbit, in an image taken by the camera on the Chang’e 3 moon lander, Dec. 15, 2013. China does not ...

NASA's ambitious mission to return astronauts to the moon for the first time this century is on track to launch no later than April 2026, but it just might fly sooner if all goes well. Final tests of ...

On July 8, 1962, the United States detonated a 1.4-megaton nuclear weapon 400 kilometers above the Pacific Ocean. The Starfish Prime test created an artificial aurora visible from Hawaii, nearly 900 ...