History of the telescope of the IRAS satellite in 1983 revolutionized infrared astronomy from space. This reflecting telescope which had a mirror, operated for nine months until its supply of coolant (liquid helium) ran out. It surveyed the entire sky detecting 245,000 infrared sources—more than 100 times the number previously known. Although optical telescopes can image the near ultraviolet, the ozone layer in the stratosphere absorbs ultraviolet radiation shorter than 300 nm so most ultra-violet astronomy is conducted with satellites. Ultraviolet telescopes resemble optical telescopes, but conventional aluminium-coated mirrors cannot be used and alternative coatings such as magnesium fluoride or lithium fluoride are used
Out of Gas: The End of the Age of Oil Out of Gas: The End of the Age of Oil Out of Gas: The End of the Age of Oil is a 2004 book written by David Goodstein. It describes peak oil and the future of civilization. The book gives the scientific view that the age of petroleum is coming to an end, and the future is dangerously insecure. Oil demand will shortly exceed the production capacity of even the largest suppliers. The book describes how the world economy is moving towards an uneasy transition. In this book, Goodstein rejected the notion that after peak occurs new alternative sources of