My colleagues and I at MIT, Harvey Mudd, NASA/JPL/Caltech, UCSD, the Max Planck Institute of Quantum Optics, and the Institute for Quantum Optics and Quantum Information in Vienna are currently developing and implementing a series of experiments that test quantum mechanics and entanglement with the help of astronomical observations. Specifically, we are aiming to close one of the last remaining loopholes in tests of Bell's inequality that could allow a so-called local hidden variable theory to mimic the predictions of quantum mechanics. To do so, we would combine a standard Earth-based experiment (a so-called Bell test) with entangled photons, but use real-time astronomical observations of distant stars in our own galaxy, distant galaxies like quasars, or patches of the cosmic microwave background, to essentially let the universe decide how to set up our experiment instead of using standard quantum random number generators, as in state of the art experiments, such as this one. For popular level discussions of our project, see here and here. Or see these technical level papers on our proposed Cosmic Bell experiment and the required theoretical cosmology background needed to chose pairs of cosmic sources whose past light cones have not intersected in the past 13.8 billion years, since the end of any early-universe inflation. See this paper for some of the theoretical motivation for doing an experiment to close the ``freedom-of-choice'' loophole in entanglement tests, and see this paper on other relevant foundational quantum experiments, including tests of wave/particle duality, where astronomical photons could be used to choose measurement settings. Finally, see here for a paper on our first successful experiment using Milky Way stars to choose Bell test detector settings, and our paper which was the first to choose Bell test detector settings with light from High Redshift Quasars.