Watch the latest video at A video report on NASA receives hundreds of proposals for asteroid projects. The space agency kicked off its Asteroid Grand Challenge on June 18 to solicit ideas for identifying, tracking, and defending the Earth from potential asteroid threats while also asking for proposals for its proposed asteroid-retrieval mission. […]

NASA announced Grand Challenge on finding asteroid threats to Earth. This Grand Challenge is focused on detecting and characterizing asteroids and learning how to deal with potential threats. NASA targets three asteroids—each about 10 meters wide—that are likely candidates for redirection. In theory, NASA and together with the private agency partners would use solar-powered spacecraft […]