The Flower Moon of May 2009 will have lots of starry (and planet-y) companions. On the evenings of the third and fourth, look for Saturn close to the Moon. On the sixth, the bright star close to the Moon at nightfall is Spica, the brightest star in the constellation Virgo, representing the sheaf of wheat in the virgin’s hand. (“Spica” means “ear of grain” in Latin.)
On the tenth, the Moon moves from virgins to scorpions—it will rise together with Antares, the vibrant reddish brightest star in the constellation Scorpio. On the sixteenth and seventeenth, on the other hand, the Moon will team with Jupiter, which looks like a bright yellow-white star.
And as if the Moon hasn’t been fickle enough so far, on the twentieth and twenty-first it will line up with Venus and Mars first thing in the mornings. Venus is the morning star this month and so bright you can’t miss it. Mars is fainter and redder. Look for it just below the Moon on the morning of the twenty-first.
On the twenty-ninth, Regulus, the brightest star in the constellation Leo, is just to the upper right of the Moon. If you want to amaze your friends with your astronomical knowledge, explain that what we see as the star Regulus is actually a system of four stars, the blue-white Regulus A and its white-dwarf companion, plus another pair, Regulus B and Regulus C.
In addition to being called the Flower Moon—April showers having theoretically brought May flowers—the full Moon of May also called the Milk Moon and the Corn Planting Moon. Look for it on the ninth.


