tokens: The authors thank the referee, Marcin Sawicki, for a helpful report that improved this paper. D.M. would like to thank Giuseppe Longo, Audrey Galametz, Sotiria Fotopoulou, and George Helou for helpful conversations. D.M., P.C., D.S., and J.R. acknowledge support by NASA ROSES grant 12-EUCLID12-0004. J.R. and D.S. are supported by JPL, run by Caltech for NASA. F.C. acknowledges support by MINECO grant ESP2015-88861. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.
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