Aberration

With regards to physics, a discontinuity or distortion in an image produced by a lens. There is also Astronomical Aberration, which is completely unrelated, and describes the difference between the apparent position of a star to an observer on earth and the actual position of the star in the sky. This is due to the time it takes the light from the star to reach us. (In the mean time, while observers on earth are 'waiting' for the star light to reach them, the star has moved). For example, when we look up in the sky, we are seeing where the sun was 9 minutes ago, since it takes light from the sun 9 minutes to reach the earth.