Twinkle, twinkle little supernova

Using Twinkles, the new simulation of images of our night sky, scientists get ready for a gigantic cosmological survey unlike any before. Almost every worthwhile performance is preceded by a rehearsal, and scientific performances are no exception. Engineers test a car's airbag deployment using crash test dummies before incorporating them into the newest model. Space scientists fire a rocket booster in a test environment before attaching it to a spacecraft in flight. One of the newest "training g...