CLEVELAND — A small robotic surveyor arrives to explore a near-Earth asteroid. Another robotic spacecraft is returning to Earth with a pristine comet surface sample. Meanwhile, a robotic explorer is ...

Proving yet again that Star Trek was scarily prescient, NASA has announced that its NEXT ion drive -- NASA's Evolutionary Xenon Thruster -- has operated continually for over 43,000 hours (five years).

Space debris is a growing threat to satellites and missions, with over 14,000 pieces already cluttering low-Earth orbit. To address this, Kazunori Takahashi, a researcher at Tohoku University in Japan ...