The bizarre object in this image by the NASA/ESA Hubble Space Telescope, dubbed Hanny's Voorwerp (Hanny's Object in Dutch), is the only visible part of a streamer of gas stretching 300,000 light-years around the galaxy, called IC 2497. This Hubble view uncovers a pocket of star clusters, the yellowish-orange area at the tip of Hanny's Voorwerp. The image was made by combining data from the Advanced Camera for Surveys (ACS) and the Wide Field Camera 3 (WFC3) onboard Hubble, with data from the WIYN telescope at Kitt Peak, Arizona, USA. The ACS exposures were taken 12 April 2010; the WFC3 data, 4 April 2010.