Signed by Hans Schlegel

The moon is constantly hit by meteorites itself and with no atmosphere and little gravity larger impacts can always eject lunar rocks into space where some material gets caught by the gravity of earth which ultimately catches the rock and it comes down as a meteoriteto earth

843mph - Mach 1

this piece contains actual flown spacecraft material

It represents a genuine line of communication between a specialist collector on Earth and a veteran cosmonaut in orbit

STS-79+81 – Soyuz TM-23/24/25 FLOWN MIR cover - COA Kaleri ROSKOSMOS Signed by Hans SchlegelFrom the celebrated astrophilatelic collection of Jacques Bracke An extraordinary Mir space stationflown cover, carried in orbit for more than seven months and signed by a remarkable total of 21 astronauts and cosmonauts. This exceptional artifact unites the crews of two Space Shuttle missionsSTS 79 and STS 81with three complete long duration Mir crews associated with the Soyuz TM 23, TM 24, and TM 25 expeditions. The cover was repeatedly processed