Columba (constellation)

Lore & Background

The earliest known mention of stars in the area of Columba comes from Aratus's 3rd century BC poem Phainomena, which notes faint stars but assigns no name or figure. Ptolemy's 2nd century AD Almagest lists several stars south of Canis Major that later became part of Columba, though the constellation itself is absent. In 1592, Petrus Plancius first depicted Columba on celestial planispheres of his large wall map to differentiate 'unformed stars' of Canis Major, naming it Columba Noachi ('Noah's Dove') after the dove that signaled the receding Great Flood. This name appears on early 17th-century globes and atlases.

Frederick de Houtman listed it in 1603 as 'De Duyve met den Olijftack' (the dove with the olive branch), and Bayer's 1603 Uranometria included it as Columba Noachi. Bartschius (1624) and Caesius (1662) also referenced it, with Caesius mistranslating a passage from Clement of Alexandria to suggest an ancient origin—a misinterpretation later repeated by Richard H. Allen in 1889. Halley catalogued it in 1679, and Lacaille listed it as a constellation in 1757 or 1763. The constellation's rigid boundaries were set in the 20th century.

Reader's Guide

Columba's significance lies in its late invention and its role in organizing faint southern stars. Plancius created it to bring order to the 'unformed stars' of Canis Major, and it was quickly adopted by major star atlases of the 17th century, including Bayer's Uranometria and Halley's Catalogus Stellarum Australium. Despite its faintness—its brightest star, Alpha Columbae, is only magnitude 2.7—the constellation contains several notable features: the runaway star Mu Columbae, the exoplanet NGTS-1b, and the globular cluster NGC 1851. It also holds the solar antapex, the point opposite the Sun's motion through the galaxy. A black hole was discovered in Columba in 2019 by OSIRIS-REx students observing X-ray bursts. The constellation's history includes a notable mistranslation by Caesius in 1662, which led to a false claim of ancient origin, later repeated by Allen in 1889. Lacaille catalogued its stars with Bayer designations in 1756, and Benjamin Gould added Xi Columbae in 1879.

Did You Know?

• Columba was first depicted by Petrus Plancius in 1592 on celestial planispheres of his large wall map.
• The constellation's original name was Columba Noachi ('Noah's Dove'), referring to the dove from the biblical flood story.
• A black hole was discovered in Columba in 2019 by students working with the OSIRIS-REx mission.
• Columba contains the solar antapex, the point opposite the direction of the Solar System's motion.