Old satellites and other space junk fall toward Earth every day, and the shock waves they create could be used to track their trajectories, according to new research.

"Do we react for everything which has a chance to reach the ground? Or do we react only for the very large objects, as we did for the Long March?" When you purchase through links on our site, we may ...

Here’s what you’ll learn when you read this story: Starlink satellites in low-Earth orbit are de-orbiting and falling to Earth at the rate of one to two per day. If Starlink continues scaling up ...