Void (astronomy)

Have you ever seen a big, empty playground? Space has super-duper big empty spots too, called voids! They are like giant bubbles where there are hardly any stars or galaxies. Most of the universe is actually made of these empty spaces. They are so big, they make our whole solar system look like a tiny speck of dust!

Scientists have been looking at the stars for a very, very long time. But it wasn't until the 1970s that they started to notice that galaxies weren't spread out evenly. They found that galaxies liked to hang out in groups, and in between these groups were huge empty areas. It was like finding giant holes in a giant cosmic donut!

Even though voids are empty, they are super important for understanding the universe. They help scientists figure out how the universe grew and changed over billions of years. By studying these empty spaces and the galaxies around them, we can learn more about the mysterious dark matter and dark energy that make up most of the universe.

Mostly, there's nothing! That's why they are called voids. But sometimes, a few lonely galaxies can be found drifting inside. It's like finding a single lost toy in a giant, empty room. These voids are much bigger than our Milky Way galaxy, and they are surrounded by walls and clusters of galaxies.