(Upper) The Hubble Space Telescope picture of the distant galaxy 1938+666
which has been imaged into an Einstein ring by an intervening galaxy. The
intervening galaxy shows up as the bright spot in the centre of the ring.
The picture was taken in the infra-red region of the spectrum and the
computer-generated colour of the image has been chosen simply for ease of
(Lower) The MERLIN radio picture of the radio source 1938+666 embedded in the
distant galaxy. The incomplete ring (or arc) shows that the radio
source is not perfectly aligned with the lens galaxy and the Earth.
The lens galaxy does not contain a radio source and hence does not
show up in this picture. The colours are computer-generated and
represent different levels of radio brightness.