You Tube video from Wochit News based on this Science News article. The end of the video is incorrect. Our experiment used photons from Milky Way stars to choose measurement settings in a Bell test with entangled particles generated here on Earth. We are actually trying to ensure that the stellar photons are as un-entangled as possible! Also, the stars are not separated by 600 light years from each other. In fact, the nearest of the two stars in each run of our experiment was about 600 light years away from Earth.
Our group developed an improved Astronomical Random Number Generator (ARNG) in an effort led by Jason Gallichio and Calvin Leung at Harvey Mudd College. By observing the color of light from distant cosmic sources such as extragalactic quasars, the ARNG can be used to make ``random'' measurement choices in foundational tests of quantum theory, including test of Bell's inequality, delayed choice interferometry tests, and delayed choice quantum eraser experiments, all in the spirit of John Wheeler's cosmic delayed choice thought experiments.
Our cosmic Bell project in the context of the Big Bell test, a fun, global experiment (run, in part, by our collaborators in Vienna) that used human volunteers to make ``random'' measurement choices in a large test of Bell's inequality.