Susan Luzzaro 6:30 p.m., July 31
Venus As Evening Star
The Planet Venus makes its debut this month as an "evening star," visible in the west after sundown. At first (around mid-February) the elongation angle of Venus relative to the sun will be small, and Venus will barely be visible over the west horizon during early twilight. By late spring and through summer, the elongation angle will increase to nearly 45 degrees, and Venus will assume a commanding position in the western sky for two or more hours after the sun sets. In October, Venus will disappear from view in the evening sky, and reappear afterward as a "morning star" --visible in the east at dawn.