It was named well before Ptolemy listed it in his Almagest in the second century.
Gemini, "The Twins" was named after a set of twins in mythology, Castor and Pollux.
in your dreams
It was named after the constellation Gemini (twins).
Pollux and Castor
the Greek culture
The Gemini spacecrafts were named after the constellation Gemini since two astronauts were required to operate the spacecraft. Gemini is Latin for "twins," representing the two-man crews that flew the missions.
No matter the year, the planet that rules Gemini is Mercury.
The beta star of Gemini is Pollux. The two bright stars of Gemini are Castor and Pollux. Although Pollux is the brightest star in Gemini, Castor was named alpha-Gemini (despite being second brightest), therefore, Pollux is beta-Gemini. Pollux is the one more southerly and easterly.
Gemini 6 was launched on December 15, 1965, and Gemini 7 was launched on December 4, 1965. Gemini 6 famously performed a rendezvous with Gemini 7 in space.
1965
Your sun will be in Gemini if you were born between 21st May and 21st June (the exact time and date varies slightly from year to year).To find out if you have the moon in Gemini, you would need to have a set of tables or to consult a web-site like astro.com.You could have Gemini as the rising sign or Ascendant on any day of the year and need to know the time and place of your birth for that.
if you are born on the 20th of June (like me) you are a Gemini. 20th of June is a special day becasue it is the day before the longest day of the year. so your birthday will be very long. how great is that!