... magnification - For optical instruments with an eyepiece, the linear dimension of the image seen in the eyepiece (virtual image in infinite distance) cannot be given, thus size means the angle subtended by the object at the focal point (angularsize ...
... actual definition is slightly different.) As the poster said, you . don't need to know the size of the AU in physical units. ... I repeat: Using only angular measurements it is impossible to measure . > the "mass" of any object. ...
... 3 June 1993 as the next ESA medium-size scientific mission (M2) of the Horizon 2000 ... E/E = 500) and fine imaging (angular resolution: 12 arcmin FWHM) of celestial gamma ...
... of a stationary nonexpanding Universe of a size not less than 40--50 thousand Mpc ... space background fluctuations on the angular resolution and the wavelength predicted ...
... decrease of Earth's angular velocity gives ave- . rage values of the decrease: (1-2)*10 -10 a year . ... also by total gravitational effect that leads, . probably, to Earth's size increase. ...