Constellation: A group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure. Modern astronomers divide the sky into eighty-eight constellations with defined boundaries.

How did people in the past use constellations?

To recognize patterns of stars, Greek and Roman both influenced the myths and names, famers also used constellations for harvest time.

The name of the constellation:

Gemini

The meaning behind the name or translation of name:

Means "twins" in Latin, The two brightest stars in the constellation, Castor and Pollux, are named for the mythological twin sons of Leda.

The family the constellation is grouped in:

The Zodiacal Family, Gemini is one of the 13 constellations of the Zodiac. It is the third sign of the Zodiac 

Who discovered/invented the constellation?

first catalogued by the Greek astronomer Ptolemy in the 2nd century. 

The story behind the name or the myth

The Twins. Gemini is a zodiacal constellation representing the twin brothers Castor and Pollux. Both were mothered by Leda, and were therefore brothers of Helen, but they had different fathers: In one night, Leda was made pregnant both by Jupiter in the form of a swan and by her husband, the king Tyndareus of Sparta. Castor and Pollux shared the same mother, Leda, the Queen Pollux's father was the god Zeus, making Pollux immortal while his twin brother Castor was mortal.

How many total stars are included in this constellation?

80 Stars

Names of major stars found in the constellation:

Pollux, Castor, Wasat, Mekbuda, Alhena, Alzirr, Tejat posterior, Propus, Mebsuta, Star cluster

What time of year (month) and time of day the constellation can best be seen?

mid-northern latitudes, for example, Gemini stands upright over the western horizon around 5 a.m. local time in early February, 3 a.m. in early March, 1 a.m. (2 a.m. daylight saving time) in early April and 11 p.m. (midnight daylight saving time) in early May.

Visible between what latitudes

Visible at latitudes between +90° and −60°.Best visible at 21:00 (9 p.m.) during the month of February.

Photograph or drawing of your constellation

Two interesting facts about your constellation

The most common explanation for their presence in the heavens is that Pollux was overcome with sorrow when his mortal brother died, and begged Jupiter to allow him to share his immortality. Jupiter, acknowledging the heroism of both brothers, consented and reunited the pair in the heavens.

Castor and Pollux were unique among those placed in the sky in that they are not represented merely as a constellation but as actual stars which mark the twin's heads in the constellation. Castor is bright white binary star, while Pollux is orange. They may be found between Cancer and Taurus.

Work Cited

http://www.space.com/16816-gemini-constellation.html

http://earthsky.org/constellations/gemini-heres-your-constellation

http://www.constellation-guide.com/constellation-list/gemini-constellation/

The name of the constellation

Cancer

The meaning behind the name or translation of name:

In Greek mythology, Cancer is identified with the crab that appeared while Hercules was fighting the many-headed Hydra. The crab bit Hercules on the foot, Hercules crushed it and then the goddess Hera, a sworn enemy of Hercules, placed the crab among the stars.