This is a color composite image of the gravitational lens system, made from Hubble (blue and green filters) and Keck (red filter) data. The blue ring is the tiny background galaxy that is being stretched by the gravitational pull of the foreground "lens" galaxy at the center of the image.
Object Names: SDSS J0737+3216, SLACS J0737+3216
Image Type: Astronomical/Illustration
To access available information and downloadable versions of images in this news release, click on any of the images below: