Imagine “a highway with an uncontrolled crowd of trucks, balls and millions of bullets flying”. This is not just an exercise in creativity: it is what happens in Earth’s orbit. Operational satellites orbit among “enormous amounts of space debris” and “other smaller uncontrolled objects” in a scenario that André Moitinho de Almeida describes as a … Continue reading André Moitinho de Almeida: from the unsustainability of space debris to the glow of the Milky Way