Space is a big place, and mostly empty — but there’s no shortage of objects which, should they float our direction, could end life as we know it. A new national plan for detecting and handling such objects was proposed today, and it includes the possibility of nuclear strikes on the incoming asteroids and other “planetary defense missions.” The plan, revealed and discussed this morning, is far from a joke — it’s just that the scales these threats operate at necessarily elevates the discourse to Hollywood levels. It’s not so much “let’s do this” as “let’s figure out what we can do.” As such it has five major goals. First, improve our ability to detect and track near-earth objects, or NEOs.