A nebula is a large cloud of dust and gas. This is the starting point for all stars.
You can actually see a bright nebula with the naked eye. (If you know what you’re looking at)
The Carina nebula is 460 light years wide and 7500 light years from Earth. It’s located in Carina constellation.
The Orion nebula is one of the brightest nebula, you can see it in the night sky if you know where to look. The nebula is located in the south of the Orion Belt.