A bright area on the surface of the sun is called a facula.

Here's a breakdown:

* Faculae (singular: facula) are bright areas on the sun's photosphere, which is the visible surface of the sun.

* They appear brighter than the surrounding photosphere because they are hotter.

* Faculae are associated with strong magnetic fields and are often found in active regions, where sunspots and solar flares occur.

* They are typically about 10,000 kilometers (6,200 miles) in diameter and can last for several days.

Let me know if you have any other questions about the sun!