Cetus
Large constellation on the celestial equator (see celestial sphere), represented as a sea monster or a whale. Cetus contains the long-period variable star Mira, and Tau Ceti, one of the nearest stars.
It is named after the sea monster sent to devour Andromeda. Mira is sometimes the most conspicuous object in the constellation, but it is more usually invisible to the naked eye.
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