The European Space Agency (ESA) wants to launch an orbiting telescope to monitor pieces of space debris as small as a few  millimeters across. Such tiny fragments of space junk are too small to be spotted with ground-based telescopes, but if they hit a spacecraft, they can cause serious damage. 

ESA hopes the satellite, the first of its kind, makes it to space in 2025, provided it gets funding approval at the 2022 council of ESA member states.