The angular diameter, angular size, apparent diameter, or apparent size is an angular distance describing how large a sphere or circle appears from a...

In astronomy, angular diameter distance is a distance defined in terms of an object's physical size, x {\displaystyle x} , and its angular size, θ {\displaystyle...

extrasolar star whose photosphere's angular size was measured in 1920, and subsequent studies have reported an angular diameter (i.e., apparent size) ranging...

the galaxy and its estimated distance, leading to an angular diameter (also called "metric diameter"). This type of measurement is subject to two significant...

relating the diameter to the radius. Angular diameter – How large a sphere or circle appears Caliper, micrometer, tools for measuring diameters Conjugate...

the diameter is 51.18±2.24 mas. The angular diameter of R Doradus is larger than any other measured star other than the Sun. The angular diameter of the...

dominated by diffraction. In that case, the angular resolution of an optical system can be estimated (from the diameter of the aperture and the wavelength of...

magnetic fields of stars List of directly imaged exoplanets Angular resolution Angular diameter List of nearest stars H.Uitenbroek; Dupree, A. K.; Gilliland...

the transverse comoving distance the "angular size distance", which is not to be mistaken for the angular diameter distance. Occasionally, the symbols χ...

thousands of R☉, comparable to some of the largest known black holes. The angular diameters of stars can be measured directly using stellar interferometry. Other...