... Cassiopeia A Light Echoes in Infrared . ... Two images of the nearby supernova remnant taken a year apart in infrared light appear to show outward motions at tremendous speeds. ... Is our Earth unique? In continuing efforts to answer this question, astronomers have now discovered an Earth-like planet orbiting a distant normal star. ... Investigators suspect the domed feature detailed above is an ice volcano, or cryovolcano, seen in infrared light through the hazy atmosphere on Saturn's moon Titan. ...