The seven main stars in hydra are:-
* Alphard - Alfard, Kalbelaphard, Cor Hydrae * γ Hya - Dhanab al Shuja, Cauda Hydrae * ζ Hya - Hydrobius * ν Hya - Sherasiph, Pleura * π Hya - Sataghni, Markeb * ε Hya - Ashlesha * ξ Hya
See related links for a star map and more information
18 is the stars of the constellation hydra
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Sigma and Hydrae
Hydra is a constellation made up of many stars. Each star is a different distance from us, so it's impossible to answer how far away it is.
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The Hydra was not 'owned'; it was a monster spawned by Typhoeus and Ekhidna, as it was a adversary of Hercules, it was favored by Hera and put among the stars.
The Hydra constellation itself does not have a specific surface temperature, as it is a grouping of stars rather than a single celestial body. However, individual stars within Hydra can have varying surface temperatures depending on their types and stages of evolution. For example, the brightest star in Hydra, Alphard, has an approximate surface temperature of around 5,600 K. Temperatures of other stars in the constellation can range widely, from cooler red giants to hotter blue stars.
Hydra.
blue white yellow red orange
The many-headed hydra is a fearsome creature.
Hydra was a many headed serpent in Greek mythology