Cassiopeia doesn't actually look like a squiggly line. It's more like a "W" or an "M", depending on the time of year and your location.

Here's why it appears that way:

* The stars are arranged in a specific pattern: The five brightest stars in Cassiopeia are arranged in a distinct shape that resembles the letters "W" or "M".

* Perspective: Because the Earth rotates and orbits the Sun, our perspective of the stars changes throughout the year. This means that the "W" or "M" pattern of Cassiopeia can appear to be tilted or even flipped depending on the time of year.

* Connecting the dots: We humans tend to connect the dots and see patterns in the night sky. While the stars themselves don't form a perfect "W" or "M", our brains naturally fill in the gaps.

So, while Cassiopeia doesn't look like a squiggly line, its unique arrangement of stars and our perspective from Earth make it appear as a distinctive "W" or "M" shape.