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Dr. Carl Henize against a backdrop of a light spectrum chart. The doctor explains that "B" stars, young stars, have a different brightness curve than our Sun. While our Sun is strongest in the visible light part of the spectrum, "B" stars are brightest in the ultraviolet part of the spectrum range. Since the Earth's atmosphere screens out 80% of the light of these "B" stars, Earth scientists see very little of the stars.
Because of this, SKYLAB is being used as a Stellar astronomy platform to be able to photograph without interference. The astronauts will hand operate a special camera from the airlock door and photograph the Heavens in a pattern of small rectangular grides each occupying one hundred stars or so. Dr. Henize gives demonstration on such a camera showing the operation the astronaut would have to go through. He also discusses the advantages of an astronaut hand operating the camera over ??? mechanized automatic system because of immediate corrections that could be made and the simplicity of the design. Ultraviolet sensitive film is used to register the spectrum strength of the ultraviolet light of the stars. The doctor also uses a model of SKYLAB to illustrate his point.
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