Andromeda is a constellation, not a star. It's a large area of the sky containing many stars, including binary stars.

Here's what you need to know:

* Constellations: Are patterns of stars as seen from Earth. They don't have any physical connection, they are just how we see them.

* Binary Stars: Are two stars that orbit around each other. They are gravitationally bound, and many exist within the constellation of Andromeda.

Examples of binary stars in Andromeda:

* Almach (γ Andromedae): This is a bright star in Andromeda, actually a triple star system with two close binaries.

* Sirrah (α Andromedae): This is the brightest star in Andromeda, and is a binary star system.

Finding these binary stars: It's not easy to tell if a star is a binary without specialized equipment. Astronomers use telescopes and sophisticated techniques to detect them.

So, while Andromeda doesn't have a single binary star system, it contains many within its vastness.