Watch the Moon Blot Out Bright Star Aldebaran Tuesday

As the moon orbits Earth, the satellite regularly passes in front of stars, causing events known as lunar occultations. Most of the stars involved are faint and require a telescope to see, but there are a few really bright stars in the moon's path, including Regulus, Spica, Antares and Aldebaran, whose occultation can be observed with the unaided eye. One such occultation occurs on Tuesday (Jan. 19), when the moon passes in front of the red-giant star Aldebaran.