Space debris. Computer artwork showing the distribution of localised space junk (debris) around the Earth, according to the European Space Agency (ESA). Such debris ranges from the remains of failed launches to defunct satellites and even unsecured tools that drifted away from an orbiting spacecraft. About 46% of the residues are in Low Earth Orbit (LEO), 6% in Medium Earth Orbit (MEO), 5% in Molniya Orbit and 43% in Geostationary Orbit (GEO). The amount of debris could be enough to make LEO and GEO orbits unusable in a few decades.