Arp 87 is a stunning pair of interacting galaxies located in the constellation of Leo, the Lion, approximately 300 million light-years away. This image by the Hubble Space Telescope reveals the stream of stars, gas and dust flowing from the large spiral galaxy NGC 3808 (on the right) to form an enveloping arm around its smaller companion. Computer simulations show that the graceful dance of this pair will go on for about a hundred million years before merging, as the Antennae galaxies did, to form an elliptical galaxy (CERN Courier December 2006 p14).