Saturn reaches nearly 4° above the eastern horizon 45 minutes before sunrise, offering increasing chances to view it this month. Saturn is getting easier to see, hanging below the Great Square of Pegasus early on May 1. Mars is fainter, but may also be visible, particularly with optical aid. Credit: Stellarium Looking for a sky event this week? Check out our full  Sky This Week  column.  April 30: Venus poses with a pair of stars Saturn, rising early in the morning, has now become a bit easier to spot in the predawn sky. About 45 minutes before sunrise on May 1, it has reached an altitude of nearly 4° above the eastern horizon, glowing at magnitude 0.9.  Located in Cetus, you’ll find Saturn hanging below the Great Square of Pegasus, whose four bright stars will be some of the last to wink out of the sky as twilight brightens.…