Gemini, one of Ptolemy's ancient constellations, is named for the Greek twins Castor and Pollux, which are also the names of two of its stars.

Pollux and Castor are two fairly bright stars not far apart on the face of the night sky, prominent on April evenings. These two are considered the “heads” in the constellation, Gemini the Twins.

While the boys of summer have hit baseball fields across the country, the boys of winter are beginning their long goodbye in the western evening sky.

The Moon will be near the two brightest stars in the constellation Gemini, Pollux and Castor (Sky & Telescope). The star Procyon will also be visible nearby (Sky & Telescope).

On Wednesday (March 29), the moon will appear just below the two twins of the Gemini constellation, Castor and Pollux. While the moon will be visible throughout the afternoon, the setting sun will ...

If you look at the crescent moon this evening (May 26) you’ll notice two bright stars to its right. They’re Castor and Pollux the mythical Greek twins.

Pollux and Castor are two fairly bright stars not far apart on the face of the night sky, prominent on April evenings. These two are considered the “heads” in the constellation, Gemini the Twins.