Crowdfunded Russian satellite will be used to help fight space junk

Last month, we wrote about a team of Russian engineers building a satellite that would appear as the brightest object in the sky, but at the time there didn't seem to be any real purpose to the mission.Now, however, the project leaders have announced that the spacecraft - named Mayak (which translates to 'Beacon') - will carry a prototype of an aerobraking system that could help combat the problem of space junk.Satellites that are decommissioned tend to remain in orbit: dead lumps of metal whizz