* Atmospheric Distortion: Earth's atmosphere is constantly moving, creating pockets of different densities. When starlight passes through these pockets, it gets refracted (bent) in different directions. This creates a twinkling effect, and since our brains try to interpret these rapidly changing light patterns, we perceive them as points with "spikes" or "rays" emanating from them.
* Telescopes: Even through telescopes, stars appear as points of light because they are incredibly far away. The light from a star is so faint that it doesn't spread out enough to create a visible disk even through powerful telescopes.
* Real Shape: Stars are actually giant balls of burning gas. They are spherical, just like our Sun.
So, the next time you see a "pointy" star, remember that it's just a trick of the light and our atmosphere!
