angular size


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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
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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.
Angular size is usually measured in degrees of the arc, although in some research it was shown by pointing to the ends of the imagined object.
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.
We're tired of the catwalks being full of tall, gaunt, angular size zero models.
3944[degrees] Angular size of the sun, from Earth 0.
There are, at least, two sources of size information that are available to observers: One is the angular size of virtual separation that is subtended at an observer's eye, and another is the angular size of real separation that is achieved by taking visual contextual surroundings into account.
In conditions of heavy fog -- which will be our focus here -- only the rear lights of the vehicle in front are visible, and the distance to that vehicle is perceived on the basis of the visible characteristics of the car's lights: their angular size, their luminance, and the angular distance between them (if there are two).
This behavior suggests that, in some cases, the emission may originate from a jet consisting of "nuggets" whose angular size are less than 1/[GAMMA], where [GAMMA] is the hulk Lorentz factor.
The group finds variations of about 42 millionths of a kelvin over patches of sky about half the angular size of that scanned by COBE.
So the difference isn't huge, about 13 per cent or so, but it's enough to change the apparent angular size of the moon - enough to be noticeable if you look closely, although most people won't notice on a casual glance.