In astronomy, angular diameter distance is a distance (in units of length) defined in terms of an object's physical size (also in units of length), x...

The angular diameter, angular size, apparent diameter, or apparent size is an angular separation (in units of angle) describing how large a sphere or...

_{k}<0\end{cases}}} Angular diameter distance: d A ( z ) = d M ( z ) 1 + z {\displaystyle d_{A}(z)={\frac {d_{M}(z)}{1+z}}} Luminosity distance: d L ( z ) =...

to have a high resolution or high angular resolution, it means that the perceived distance, or actual angular distance, between resolved neighboring objects...

sphere or circle appears from a given point of view Angular diameter distance, used in astronomy Angular Recording Corporation, a British independent record...

Angular distance or angular separation is the measure of the angle between the orientation of two straight lines, rays, or vectors in three-dimensional...

approximate angular diameter of the universe and the physical size of the particle horizon that had existed at this time. The angular diameter distance, in terms...

{\displaystyle D_{L}} is the angular diameter distance to the lens, D S {\displaystyle D_{S}} is the angular diameter distance to the source, and D L S {\displaystyle...

transverse distance" D M {\displaystyle D_{M}} by D L = ( 1 + z ) D M {\displaystyle D_{L}=(1+z)D_{M}} and with the angular diameter distance D A {\displaystyle...

Etherington distance-duality equation is the relationship between the luminosity distance of standard candles and the angular diameter distance. The equation...

that its angular diameter distance is actually less than that of some galaxies with lower redshift. This means that the ratio of its angular size (how...

measuring the distance between source and observer. The distance measured by a standard ruler is known as the angular diameter distance. Standard candles...

measurements of the Hubble parameter and angular diameter distance, respectively. The angular diameter distance and Hubble parameter can include different...

related to the diameter of circles and sets include: Angular diameter, how large a circle or sphere appears in a field of view Diameter (computational...

In optical storage, constant angular velocity (CAV) is a qualifier for the rated speed of any disc containing information, and may also be applied to...

February 2008. Retrieved 23 February 2008. Hu, W. "Animation: Angular diameter distance scaling with curvature and lambda". University of Chicago. Archived...

data can also be used to determine the Hubble constant using the angular diameter distance of the cluster. These thermal distortions can also be measured...

the apparent (angular) size as seen in the eyepiece and the angular size of the object when placed at the conventional closest distance of distinct vision:...

in the International System of Units (SI) and is the standard unit of angular measure used in many areas of mathematics. It is defined such that one...

the disk's radius. If instead the disk rotates about its diameter (e.g. coin toss), its angular momentum L {\displaystyle L} is given by L = 1 2 π M f r...

50–60 mas. Assuming a distance of 197 pc, this means a stellar diameter of 887±203 R☉. Once considered as having the largest angular diameter of any star in...

others, the BOOMERanG data from 1997 and 1998 determined the angular diameter distance to the surface of last scattering with high precision. When combined...

looking at the distances at which galaxies at different redshifts tend to cluster, it is possible to determine a standard angular diameter distance and use that...

describe small astronomical angles such as the angular diameters of planets (e.g. the angular diameter of Venus which varies between 10″ and 60″); the...

bandpass, and interfering light from scattering and airglow. Angular diameter Distance modulus List of nearest bright stars List of nearest stars Luminosity...

from Earth. The change in angular diameter of the Sun with distance is illustrated in the diagram below: The angular diameter of a circle whose plane is...

times Earth's diameter and a non-stop plane flight traveling that distance would take more than two weeks. Around 389 lunar distances make up an astronomical...

350±520 L☉. The measured angular diameter, again assuming a distance of 55 pc gives a radius of 298±21 R☉. The angular diameter and bolometric flux of R...

"The Moon's diameter subtends an angle of half a degree." The small-angle formula can convert such an angular measurement into a distance/size ratio....

the distance of the Moon. Such an event might be observable (an asteroid of 25 metres' diameter at a distance of 380,000 km has an angular diameter of...