That's a bit of a tricky question! While stars are incredibly dense, the densest known objects in the universe are not stars, but rather the remnants of massive stars after they have died.

The densest objects we know of are neutron stars. They are formed when massive stars run out of fuel and collapse under their own gravity. The collapse is so intense that protons and electrons are forced together to form neutrons, creating an incredibly dense object packed with neutrons.

Here's why neutron stars are so dense:

* A teaspoonful of neutron star material would weigh billions of tons.

* They are about 1.5 times the mass of our Sun, squeezed into a sphere only about 20 kilometers across.

So, while stars themselves are incredibly dense, neutron stars are even more dense!