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
The Warmth of the Sun (album) The Warmth of the Sun (album) The Warmth of the Sun is a 2007 compilation of music by The Beach Boys released through Capitol Records. A companion to 2003's "", "The Warmth of the Sun" is composed of fan favorites and hits that were left off its predecessor. Several songs were remixed in stereo for the first time. These are "All Summer Long", "You're So Good to Me", "Then I Kissed Her", "Please Let Me Wonder", and "Let Him Run Wild". The song "Wendy" appears as a new stereo remix with its middle eight cough edited out. This album also