Taurus Constellation: The Bull of Heaven, Aldebaran, and the Star Clusters at Its Shoulder

The Taurus constellation is one of the oldest star groupings on record: Babylonian astronomers catalogued it as the Bull of Heaven roughly three thousand years ago, and a cluster of dots on a cave wall in France may mark the same stars seventeen thousand years earlier than that. It earns its place in the sky without needing a myth to prop it up. Two of the most recognizable star clusters visible to the naked eye sit inside its outline, along with one of the brighter stars in the winter sky. This is the second entry in a twelve-part series walking through the actual constellations behind the twelve zodiac signs, following the ram that opened it.

Aldebaran and the Star Clusters of the Taurus Constellation

Aldebaran, Alpha Tauri, is an orange giant star at magnitude 0.85, bright enough to rank among the fifteen brightest stars in the sky, sitting about 65 light years away. It marks the bull's eye, glowing at one tip of a V-shaped cluster called the Hyades, which forms the animal's face. Past the tips of the V, the Pleiades cluster, also known as the Seven Sisters, sits on the bull's shoulder: several hundred young stars packed into a compact group roughly 444 light years out, of which six or seven are visible to the naked eye under a dark sky. Both clusters were used for naked-eye timekeeping since antiquity, marking planting and harvest seasons long before either got a Greek name.

From the Bull of Heaven to the Bull That Carried Europa

Babylonian skywatchers called the constellation the Bull of Heaven, the same figure that appears in the Epic of Gilgamesh: sent by the goddess Ishtar to punish Gilgamesh for spurning her, killed instead by Gilgamesh and Enkidu. Greek astronomers kept the animal but rewrote the story. Zeus, disguised as a white bull, carried Europa across the sea to Crete, and the constellation shows only the animal's head and forequarters, as though the rest of the bull were still submerged. Ovid told the abduction in full; the sky version stops at the waterline.

Is Aldebaran Part of the Hyades Cluster?

No, and this is the constellation's best-known trick of perspective. Aldebaran sits at 65 light years, while the Hyades cluster it appears to anchor is roughly 150 light years away. The star is a foreground object on the same line of sight, not a member gravitationally bound to the cluster. The distinction only became measurable once parallax observations could separate the two distances, the same method that pinned down how far away the Pleiades actually sit.

Some researchers read the string of dots above the bull figure in the Lascaux cave paintings as a rough sketch of the Pleiades, which would make it one of the oldest star maps on record, though the claim stays contested among archaeologists. What is not contested is the astronomical age of Taurus itself: from roughly 4000 to 2000 BCE, precession placed the spring equinox inside this constellation rather than Aries, an era historians call the Age of Taurus.

Anyone with a Sun, Moon, or rising sign in Taurus can see the exact degree it sits at, next to Aldebaran's or nowhere near it, with a free natal chart.