Crowded, Congested Space

摘要

Last year, an Iridium communications satellite unexpectedly went dead. US military space analysts soon discovered it hadrnsmashed into a derunct Russian Cosmos satellite, a collision that destroyed both spacecraft and created a large and dangerous debris field in space.rnThat incident followed another worrisome event. In January 2007, China successfully tested an anti-satellite missile against one of its own defunct satellites. That attack, a direct hit, created 150,000 pieces of space clutter-not all of it even visible to US space operators.