This series brings together 90 constellations from across the night sky. The selection includes well-known star patterns alongside fainter, lesser-seen groupings from both hemispheres.

Constellations are recognized patterns of stars that form shapes across the celestial sphere. Each one covers a defined region of the sky and carries a name rooted in mythology, animals, or everyday objects. They range widely in size and brightness, from sprawling figures to small, compact groups. Astronomers use them to map the sky, locate objects, and track the seasons, while stargazers rely on them to find their way among the stars.

Interesting and little-known facts about Constellations:

• The International Astronomical Union officially recognizes exactly 88 constellations covering the entire sky.
• Hydra is the largest constellation, stretching across roughly 1,303 square degrees.
• Crux, the Southern Cross, is the smallest, spanning only about 68 square degrees.
• Ursa Major contains the Big Dipper, one of the most recognized star patterns in the world.
• Many constellation names date back more than 2,000 years to ancient Greek and Babylonian astronomers.
• Centaurus holds Alpha Centauri, the closest star system to our Sun at about 4.3 light-years away.

The alphabetical index below lets you browse every constellation in order, and each page lists the name, hemisphere, best viewing month, notable stars, and a short description.