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Gravity's Fatal Attraction:
In "Gravity's Fatal Attraction", Martin Rees (Astronomer Royal) and Mitchell Begelman explore gravity where it is infinitely strong: in black holes. These mind-boggling structures can have a mass up to billions of times that of our own sun, but remain detectable only by the evidence of a powerful gravitational force swallowing everything in its vicinity. Updated in paperback to include the latest discoveries, and featuring superb illustrations and photographs, this account of black holes and the associated phenomena of quasars and cosmic jets reveals the workings of our strange and amazing universe. [via]