The European Space Agency's <a href="https://en.wikipedia.org/wiki/Faint_Object_Camera" class="extiw" title="en:Faint Object Camera">Faint Object Camera</a> on board NASA's <a href="https://en.wikipedia.org/wiki/Hubble_Space_Telescope" class="extiw" title="en:Hubble Space Telescope">Hubble Space Telescope</a> has provided astronomers with the most detailed image ever taken of the gravitational lens G2237 + 0305 — sometimes referred to as the <i><a href="https://en.wikipedia.org/wiki/Einstein_Cross" class="extiw" title="en:Einstein Cross">Einstein Cross</a></i>. The photograph shows four images of a very distant <a href="https://en.wikipedia.org/wiki/quasar" class="extiw" title="en:quasar">quasar</a> which has been multiple-imaged by a relatively nearby galaxy acting as a <a href="https://en.wikipedia.org/wiki/gravitational_lens" class="extiw" title="en:gravitational lens">gravitational lens</a>. The angular separation between the upper and lower images is 1.6 arcseconds.
NASA, ESA, and STScI
1990-09-13
<a rel="nofollow" class="external free" href="http://hubblesite.org/newscenter/archive/releases/1990/20/image/a/">http://hubblesite.org/newscenter/archive/releases/1990/20/image/a/</a>