Canis Major
Canis Major was a constellation. 

The Canis Major Constellation was partially visible on a viewscreen in the briefing room on the  in 2266. It was a star chart of the winter sky as seen from Earth. The constellation Canis Major was visible in the lower left corner of the chart and identified by name. ()

Related link 
 Sirius (Alpha Canis Majoris; possibly aka Alpha Majoris)

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Constellations