Of course, the moon and Antares won't be the only celestial sights on May 13. The bright star Arcturus will be visible almost ...

Two days later, the just-past-full moon will occult the star Antares. Moons are full when they are on the opposite side of Earth from the sun, and fully illuminated (from the point of view of Earth).

The still nearly Full Moon passes close to the heart of the Scorpion, Antares, visible in the southern sky early this morning.

It's all a matter of perspective. The moon will slide in front of the red supergiant star Antares on May 13, briefly blocking its light just a day after reaching its full "Flower Moon" phase.