A Chinese high-altitude balloon violated U.S. airspace, a serious enough breach to nix a high-level diplomatic meeting in Beijing. The balloon itself, however, was not much of a threat.
Private satellite companies have boomed in recent years, and many experts have wondered what role they would play in a conflict. They have proved to be invaluable to Ukraine in recent months.
Two defunct satellites passed within metres of one another, prompting renewed focus on the dangers of space debris. But with many satellites treated as military secrets, how do we track the hazards?