Gugalanna

Gugalanna (Sumerian gu.gal.an.na, "the Great Bull of Heaven"), better known as the Bull of Heaven (Sumerian: gu₄.an.na), was a deity in ancient Mesopotamian religion originating in Sumer as well as the constellation known today as Taurus, one of the twelve signs of the Zodiac.

Mythology
Gugalanna was sent by the gods to take retribution upon Gilgamesh for rejecting the sexual advances of the goddess Inanna. Gugalanna, whose feet made the earth shake, was slain and dismembered by Gilgamesh and his companion Enkidu. Inanna looked down from the city walls and Enkidu shook the haunches of the bull at her, threatening to do the same if he ever caught her. He is later killed for this impiety.

Gugalanna was the first husband of Ereshkigal, ruler of the Underworld, a gloomy place devoid of light. It was to share the sorrow with her sister that Inanna later descends to the Underworld.

Astrology
Taurus was the constellation of the Northern Hemisphere's March equinoxfrom about 3200 B.C. The equinox was considered the Sumerian New Year, Akitu, an important event in their religion. The story of the death of Gugalanna has been considered to represent the Sun obscuring the constellation as it rose on the morning of the equinox.