Sky Tonight—May 10, First quarter moon shows a

Courtesy of EarthSky A Clear Voice for Science Visit EarthSky at www.EarthSky.org As the moon lights up the sky this evening, everyone will see the moon fairly close to Regulus, the brightest star in the constellation Leo. The moon is not flat, but tonight’s first quarter moon does appear to have a “flat” edge to it. The apparently flat edge of the moon at the quarter phase is called the “terminator.” No, that is not a reference to a Schwarzenegger sci-fi movie. Instead, it ... Full Story