Three of winter’s brightest stars — Betelgeuse, Sirius, and Procyon — form a prominent equilateral triangle that frames a surprisingly barren part of the February sky. This vast empty region is labeled Monoceros the Unicorn, but I doubt many of us are able to see such a whimsical creature among the constellation’s dim stars.
Phil Harrington’s Binocular Universe: The Winter Triangle
February 2009: Three bright stars frame Monoceros and hold many open star cluster delights.