Cassiopeia: Find the W and Never Lose North

The Cassiopeia constellation is one of the most rewarding shapes to learn, because once you spot its bright zigzag you have a built-in compass for the whole night sky. It looks like a giant letter W (or M, depending on the time of night) made of five stars, glowing steadily in the northern sky. Find it once and you will never lose north again.

How to find the Cassiopeia constellation

Face north and look for five fairly bright stars arranged in a stretched-out W or M. The pattern is small but distinct, and nothing else nearby quite matches that crooked zigzag. Because it sits opposite the Big Dipper across the North Star, you can almost always see one or the other, no matter the season.

Cassiopeia never sets for many viewers in the northern half of the world. Instead it wheels slowly around the celestial pole through the night, so the W may appear tilted, sideways, or flipped into an M depending on when you look.

Using the W to find north

The W points the way. Imagine the deeper of its two valleys as an arrow, and follow that direction outward to land near Polaris, the North Star. Once you have Polaris, you have true north, and the rest of the sky falls into place around it.

Cassiopeia drifts through the heart of the Milky Way, so under a dark sky the area around the W shimmers with faint background starlight and rich, dense star fields worth slowly scanning.

Tips for spotting it

• Face north and scan for the bright, jagged W or M shape.
• Remember it sits across the North Star from the Big Dipper.
• Trace the deeper notch of the W to point you toward Polaris.
• Let your eyes adjust to the dark for several minutes first.
• Try binoculars on the surrounding Milky Way star clouds.

If you can already spot Cassiopeia's brighter neighbor, this guide to finding the Big Dipper pairs perfectly with it, and together they make it effortless to find the North Star in seconds.

Ready to trace the W yourself? Open the Starly sky map, let it find your location, and watch Cassiopeia light up exactly where it circles the pole above your horizon right now.