Because Antares is a red supergiant star, it takes more than the blink of an eye to disappear and reappear. I often refer to the constellation Octans the Octant during my planetarium presentations.

The Moon passes 0.4° south of the bright red giant Antares in Scorpius this morning ... Betelgeuse shines at magnitude 0.5 and is a red supergiant - similar to slightly fainter (magnitude 0.9 ...