Looking for a sky event this week? Check out our full Sky This Week column.  August 19: The Helix Nebula The waxing gibbous Moon dominates the evening sky, located in Scorpius. You’ll find it close to the Scorpion’s red giant heart, 1st-magnitude Antares. Watch it close in as the hours tick by — our satellite will pass Continue reading "The Sky Today on Thursday, August 20: Dark, flat Plato" The post The Sky Today on Thursday, August 20: Dark, flat Plato appeared first on Astronomy Magazine .