A celestial crown is a fancy hat that we imagine gods and goddesses might wear. It's made of stars, planets, and other celestial objects that are really far away in space. We can't reach them, but we can see them in the sky.
Sometimes, people in ancient times would create stories and legends about gods and goddesses who wore celestial crowns to show their power and authority. These crowns were often decorated with beautiful gems and precious metals, just like the crowns that kings and queens wear.
When we look up at the sky at night, we can see billions of stars and planets that are spread out across the galaxy. They form beautiful patterns and shapes, like a big picture puzzle in the sky. And sometimes, people might imagine that these patterns and shapes are part of a celestial crown that a god or goddess might wear.