Hydra
is the largest constellation in the sky but is by no means easy to
find on account of its faintness. Hydra has only one readily
identified star alpha or Alphard which marks the heart of the snake.
Hydra is usually identified with the multi headed creature that was
slain by Hercules.
Alpha
or Alphard which means the ‘Solitary One’ is a magnitude 2-0 star
lying at a distance of 177 light years. Alphard is a K3 orange giant
star.
Gamma
has a brightness of magnitude 3.0, its a G8 giant star lying at a
distance of 134 light years.
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