Castor, the second-brightest star in the constellation Gemini, is one of the most luminous stars over Earth and a key target for skywatchers, showing there is often much more to stars than meets ...

In the Western zodiac, the constellation is named for Castor (or Alpha Geminorum) and Pollux (Beta Geminorum), twin half-brothers born to the Spartan queen Leda. Get the Space.com Newsletter.

This week, a remarkable celestial alignment will occur in the western sky, providing an exciting opportunity for stargazers.

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.

The constellations help us find our way around the sky, ... Gemini's head stars, Castor and Pollux (labeled "2" below), stand out in the sky due to their brightness. Cassiopeia ...

Tonight's gibbous moon can help guide skywatchers to two iconic stars in the night sky. On Wednesday (March 29), the moon will appear just below the two twins of the Gemini constellation, Castor ...

Castor became one of the finest horsemen in the land, and Pollux became a championship boxer. The constellation Gemini is also the backdrop for the annual Gemini meteor shower that peaks the night ...

If you connect Mars with Pollux and Castor, both from the constellation Gemini, you get smaller isosceles triangle, with the Red Planet as the brightest of the three points.

THE DECEMBER HEAVENS; Beautiful Stars and Constellations on View in the Sky. In Addition to Orion in the Same Section May Be Seen the Group of the Twins with Castor and Pollux -- The Other Displays.

Since late autumn, the great constellation Orion the Hunter has been gradually migrating westward across the Pottsville evening sky. His calling card is his bright belt of three stars in nearly a ...

At this moment, it forms a conspicuous triangle with two nearby bright stars, Castor and Pollux, in the constellation Gemini. To echo H.A. Rey in his classic "The Stars — A New Way to See Them": ...