Here's why:

* Atoms are the basic building blocks of matter, composed of a nucleus (protons and neutrons) and electrons.

* Neutron stars are the incredibly dense remnants of massive stars that have collapsed. They are made up primarily of neutrons packed extremely tightly together.

Think of it this way:

* An atom is like a single Lego brick.

* A neutron star is like a giant, solid structure built entirely from billions and billions of tightly packed Lego bricks.

While both atoms and neutron stars contain neutrons, the scale and structure are vastly different. A neutron star is not a single, gigantic atom. It's a collection of matter in a state so extreme that it's unlike anything we find on Earth.