All four blue images in the above photograph [ http://www.subaru.naoj.org/outreach/press_releases/990128/ ] are the same object. The gravitational lens [ http://vela.astro.ulg.ac.be/themes/extragal/gravlens/bibdat/engl/index.html ] effect of the red, foreground, elliptical galaxy [ http://www.seds.org/messier/elli.html ] visible near image center creates a cloverleaf image of the single distant quasar [ http://antwrp.gsfc.nasa.gov/apod/ap980409.html ]. Light from the quasar [ http://www.student.nada.kth.se/~f93-cal/Qcontents.html ] is pulled around the massive galaxy in different paths, corresponding to different images. Light takes many billions of years to reach us from this quasar. Since light takes a different amount of time to traverse each path, each image shows the quasar as it appeared at a slightly different time in the past, creating time delays [ http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1998PASJ...50..175A ] on the time scale of days. Since these time delays are influenced by the expansion rate of the universe [ http://antwrp.gsfc.nasa.gov/debate/debate96.html ], analysis of this image helps reveal Hubble's constant [ http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?1996PASP%2E%2E108%2E1073T ], the parameter that calibrates universe expansion [ http://www.astro.ucla.edu/~wright/cosmology_faq.html ]. This recent picture [ http://www.subaru.naoj.org/outreach/press_releases/990128/ ] by the new Subaru Telescope [ http://antwrp.gsfc.nasa.gov/apod/ap990201.html ] is perhaps the clearest image yet of this famous optical mirage [ http://antwrp.gsfc.nasa.gov/apod/ap981102.html ].