Angular diameter distance
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Earth
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astronomy
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International Standard Book Number
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Euclidean geometry
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radian
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redshift
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Hubble–Lemaître law
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Euclidean space
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physical cosmology
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angular diameter
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unit of length
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Lambda-CDM model
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Friedmann–Lemaître–Robertson–Walker metric
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comoving distance
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distance measures
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deceleration parameter
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standard ruler
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