The Twins. Castor and Pollux, the "twins" of Gemini, were born to Leda and Jupiter, Greek heroes. They were among the men Jason led on his voyage to fetch the golden fleece.

There are several bright clusters and nebula in Gemini, such as M35, a large open cluster at the feet of the twins. In December, one of the best meteor showers of the year, the Geminids, radiates from the heads of Gemini.