The small angular separation
between the foreground and background galaxies gave the current team an opportunity to investigate the effect of gravitational lensing on the properties of the background galaxy.
In 2008 the angular separation
is closer to 42 arcminutes, and it will be after 2060 before the separation is under 30 arcminutes (0.
The Mars and comet images have been added together to create a single picture to illustrate the angular separation
, or distance, between the comet and Mars at closest approach.
The angular separation
should be small, partly as the author owns a small CCD sensor and partly so that transparency variations (such as thin cirrus cloud) are minimised between the target and comparison stars.
As the source of random numbers for his "celestial" estimate of pi, Matthews used the angular separation
between the positions of pairs of the 100 brightest stars.
The astronomers measured the angular separation
between the three magnified images of the galaxy in the Hubble photos.
7[degrees] from the Sun, but even at that short angular separation
a segment of it was still very weak.