Defunct satellites, spent rocket stages, anti-satellite tests and mega-constellations have turned Earth's orbit into a crowded shell. A SimplyPut guide.
A piece of a SpaceX Falcon 9 rocket slammed into the Moon on August 5 after drifting through space for more than 18 months. The high-speed collision kicked up a plume of debris and gouged out a fresh… [+13617 chars]