The Hydra constellation can be viewed the best in the springtime, in the March night sky. Hydra is one of the largest constellations that appears in the night sky during this time of the year. It is a massive constellation and is viewed the best in pieces. Stargazers that look to the South, above Sirius, and Perseum can view Alphard, the brightest star in Hydra. Gemini, featuring Castor and Pollux, which are also the names of Gemini's twin brothers, can also be seen in March between Capella and Procyon. View this and more great astronomy videos at History.com.