It was a perfect night for stargazing. The heat and humidity of the day had dissipated, and the sky was clear and bright. We weren’t scheduled for one of the major astronomical events that occur regularly, like the Perseid or Leonid meteor showers, or for a once-in-a-lifetime event like a super-blood-red-total-lunar-eclipse-moon. But when our neighbors invited a group of us over to enjoy the night sky and each other’s company, we were all in. “Bring your binoculars,” they said. It was still light out when [...]