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Galaxies and the Universe - Observational Cosmology
Small Angle Formula Imaging the Universe - The University of Iowa
Apparent Size (or Angular Size) : A Description and Example Problem
Angular Size
Positions and Sizes of Cosmic Objects - Las Cumbres Observatory
Angular Size - ShotStat
Angular Size
Angular Size Calculator
Angular diameter - Wikipedia
Apparent magnitude - Wikipedia
Calculating the size of the Sun and the Moon from angular size and distance
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