* Star-shaped: We don't actually say stars are star-shaped in a literal sense. The word "star" is used to describe both the celestial object and the geometric shape. So, when we talk about a star-shaped object, we're referring to the shape, not the actual star in the sky.

* Twinkle: Stars do twinkle, but not because they're actually flashing. The twinkling effect is caused by the Earth's atmosphere. As light from a star travels through our atmosphere, it gets bent and refracted by the different layers of air. These constant shifts in the light path make the star appear to flicker.

Think of it this way:

* A star itself is a giant ball of burning gas, steady and consistent.

* The twinkling is a result of how we perceive its light on Earth, not a property of the star itself.