Here's why:

* Nebulae are vast clouds of gas and dust in space. They can be hundreds or even thousands of light-years across.

* Our solar system is just a tiny speck in comparison. It spans about 1.5 light-years across, with the farthest reaches of the Oort cloud being about 10,000 astronomical units (AU) from the sun.

Think of it like this:

* A nebula is like a giant, swirling ocean.

* Our solar system is like a tiny boat floating on that ocean.

Nebulae are the birthplace of stars, and some are so large that they can contain entire star clusters. Our solar system is just one small part of a much larger universe.