A neutron star is what’s left after a massive star explodes in a supernova and its core collapses. The gravity is so intense that protons and electrons are crushed together into neutrons, forming one of the densest objects in the universe.

To put it in perspective:

✓1 teaspoon of neutron star matter = ~6 billion tons (5.5 x 10¹² kg) That’s about the weight of all the human-made structures on Earth combined.

✓The density is roughly 400 million tons per cubic inch.

✓If you dropped that teaspoon of neutron star on Earth, it would punch straight through the planet like a bullet through tissue paper nothing could hold its weight.

Neutron stars are so dense that their gravity warps space time, and their magnetic fields can be trillions of times stronger than Earth’s. They spin rapidly some hundreds of times per second and can emit beams of radiation like lighthouses in space (called pulsars).

It’s one of the most extreme, alien objects in existence and yet it's a natural outcome of star death.