Scientists in the United Kingdom made a tractor beam. In science-fiction movies, TV shows and books, a tractor beam is an invisible ray that moves things around. Inventing the tractor beam is very complicated. It uses sound waves to hold and move items. So far, the tractor beam only works with small objects. Maybe someday astronauts will use it in their space travels.
Scientists in the United Kingdom made a tractor beam. In science-fiction movies, TV shows and books, a tractor beam is an invisible ray that moves things around. Inventing the tractor beam is very complicated. It uses sound waves to hold and move items. So far, the tractor beam only works with small objects. Maybe someday astronauts will use it in their space travels.