One of the more credible of the various 2012 “end is nigh” scares is the prospect of a massive “Near Earth Object” (NEO), most likely a meteor or asteroid, smashing through the Earth’s atmosphere, causing damage locally on impact and potentially causing such great meteorological disruption that our way of life is changed forever, possibly to an extinction level. Frighteningly there is usually hardly any warning that they are coming. MIT’s Technology Review reports on an astronomer’s plans for a network of telescopes that could give up to three weeks’ warning of a city-destroying impact, on its Physics arXiv Blog:
At about 3am on 8 October last year, an asteroid the size of a small house smashed into the Earth’s atmosphere over an isolated part of Indonesia. The asteroid disintegrated in the atmosphere causing a 50 kiloton explosion, about four times the size of the atomic bomb used to destroy Hiroshima.