angular size


Also found in: Wikipedia.

size, angular 

The size of an object measured in terms of the angle it subtends. The point of reference for the eye can be either the nodal point or the centre of the entrance pupil. See extended object; apparent size.
apparent s. 1. The size of an object represented by the angular size. 2. The perceived size of an object as distinguished from the actual size (Fig. S8).
s. constancy See size constancy.
s. lens See aniseikonic lens.
Fig. S8 Objects of different size seen in the same direction and with the same angular size stimulate the same retinal points and thus have the same apparent sizeenlarge picture
Fig. S8 Objects of different size seen in the same direction and with the same angular size stimulate the same retinal points and thus have the same apparent size
Mentioned in ?
References in periodicals archive ?
They are not exactly equal, however, due to the angular size of the sun and atmospheric refraction," it pointed out.
BOOMERanG discovered the angular size of the largest blobs: one degree, confirming predictions.
In the case of the star-forming region called G007.47+00.05 at the other end of our galaxy, that would be "roughly equal to the angular size of a baseball on the Moon," according to (https://public.nrao.edu/news/vlba-milky-way/) a statement Thursday by the National Radio Astronomy Observatory (NRAO).
For clarity of argumentation, it is important to distinguish between linear size (which can, for example, be measured in centimeters), and angular size. The linear size of a particular object is an objective property that does not change over time.
At that point, an additional allotment of observing time will continue the search across a field of view roughly the angular size of the full moon.
Also, let's enjoy it while we can - since the Moon's orbit is increasing in size, its angular size is decreasing.
If the interpolar distance is equal to angular size of the slot opening, pulsations of torque become aligned; it is done because of constancy of mutual covering areas of stator teeth and rotor poles.
Methods include using high-resolution radio data to extrapolate flux densities of point sources assuming a given EM and angular size (e.g., Perrott et al., this issue) or the use of Ha [5] and/or Radio Recombination Line(s) data [18].
"We're tired of the catwalks being full of tall, gaunt, angular size zero models.
Despite the small angular size (3.7" at opposition), a number of observations were made of Uranus' disk and typical results are shown in Figure 3.
Earth's Period of Revolution 365.25636 days Venus' Period of revolution 224.701 days Inclination of Venus' orbit to ecliptic 3.3944[degrees] Angular size of the sun, from Earth 0.534[degrees] Students could be encouraged to engage in some research to locate this information for themselves, via a search of the World Wide Web, or their school library resources, for example.