| 11. | Astronomers also measure the " apparent size " of objects as an angular diameter.
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| 12. | The angular diameter of Betelgeuse is only exceeded by R Doradus ( and the Sun ).
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| 13. | The angular diameters of the four smaller moons ( as seen from Pluto ) are uncertain.
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| 14. | The distance measured by a standard ruler is what is known as the angular diameter distance.
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| 15. | Uranus is a relatively faint object, and its visible angular diameter is smaller than 43.
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| 16. | Evans major contribution to astronomy was using the angular diameters of stars to calculate their surface brightness.
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| 17. | The dwarf planet Pluto has proven difficult to resolve because its angular diameter is about 0.1 arcsecond.
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| 18. | For bodies that appear smaller in angular diameter than the Sun, the proper term would be a transit.
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| 19. | So basically if what is the relationship between angular diameter and amount of energy it radiates and its wavelength.
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| 20. | From this distance, the sun's angular diameter is reduced to one and a quarter arcminutes across.
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