What does red shifting indicate to astronomers?
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Red shift' is a key concept forastronomers. The term can be understood literally - the wavelength of the light is stretched, so the light isseen as 'shifted' towards the red part of the spectrum. Something similar happens to sound waves when a source of sound moves relative to an observer.
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sarika58:
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Maun Maun, village, northwestern Botswana. It lies at the southern edge of the Okavango Swamp (the inlanddelta of the Okavango River), northeast of Lake Ngami.
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