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Gemini Constellation

Castor and Pollux are the starting point for recognizing Gemini. The bright pair marks the twins' heads and makes the constellation easy to identify on winter evenings.

GemIAU abbreviation PolluxBrightest star winterTypical season

Star map

The shape of Gemini

J2000
Pollux Castor Alhena Tejat Mebsuta Propus Wasat Mekbuda
Relative positions are derived from the selected stars' J2000 equatorial coordinates. The lines are a recognition aid and are not official IAU boundaries.

Gemini in your sky

Where to look from your location

Choose a city or use your device location. DailyZodiac calculates the constellation's altitude and direction and finds when it will be highest during civil night.

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Your location is used only for this calculation and is not stored in cookies or localStorage.

Principal stars

Stars of the Gemini constellation

Click a star on the map or in the table: it will be highlighted and DailyZodiac will load a NASA SkyView astronomical field centered on its J2000 coordinates.

Star Designation Magnitude In your sky
β Gem 1.14
α Gem 1.58
γ Gem 1.93
μ Gem 2.88
ε Gem 2.98
η Gem 3.28
δ Gem 3.53
ζ Gem 3.79

How to recognize it

How to find the Gemini constellation

1

Pollux

Start with the brightest star; it is the easiest landmark to confirm on the map and in the real sky.

2

Trace the pattern

Use Pollux, Castor, Alhena as landmarks and compare their pattern with the J2000 map.

3

Check today's sky

The typical observing season is winter, but direction and altitude change with time and location, so use the calculator above.

Astronomical data

Where the coordinates and images come from

The map uses a curated subset of bright stars with J2000 equatorial coordinates derived from the Bright Star Catalog; local sky calculations use Astronomy Engine. Click-to-view images are generated by NASA Goddard SkyView.

NASA HEASARC · Bright Star Catalog · NASA SkyView

Astronomy and astrology

Gemini constellation, zodiac sign and rising sign

The constellation is a real astronomical region of the sky. The zodiac sign and rising sign belong to astrology. DailyZodiac links all three pages while keeping the concepts distinct.

Gemini constellation questions

What is the brightest star in Gemini?

Pollux.

When can I see the Gemini constellation?

The typical season is winter, but actual visibility depends on date, time, latitude, weather and light pollution.

Are the constellation, zodiac sign and rising sign the same thing?

No. The constellation is astronomical; the zodiac sign and rising sign are distinct astrological concepts.