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Monoceros, the Unicorn

Mon

Monocerotis

Sky Chart and Artist Rendering of Monoceros

Origin:
Monoceros was known by the Persians but is otherwise an old but undated constellation.  The unicorn is found on star maps for the first time on the 1624 sky map by Jakob Bartsch (son-in-law of Johannes Kepler) and seen again in 1690 on Hevelius' star maps.  The legends of the unicorn may have been inspired by the narwhale, a horned whale.

Information:
The brightest stars in Monoceros are only 4th magnitude so the area of the sky appears barren (and in urban areas even devoid of stars). The constellation is still easy to find since it is nearly entirely inside the "Winter Triangle" (Sirius, Betelgeuse, and Procyon) and bounded by constellations Canis Major, Orion, and Canis Minor. For northern observers the constellation is a winter constellation and highest in the sky at 9 pm in late February or early March. The Orion Arm of the Milky Way Galaxy runs directly through Monoceros and we are looking directly away from the center, through the plane, of the Galaxy.  Monoceros is home to a variety of remarkable nebulae (one of which is visible even with binoculars in a dark sky location) and multiple stars.