As night descended, a rumble of frogs filled the air in this park outside the central Mexican city of Queretaro. In the sky, tiny stars appeared one by one, aligning into constellations.
Juan Carlos Hernández used his weight to adjust a large telescope. “Aim for me, Rich!” he yelled to his friend. Ricardo Soriano focused a green laser on a small patch of clouds, targeting where the Tsuchinshan-Atlas comet will soon be visible.
