Neutron Stars

Neutron stars are the ultra-dense remnants of massive stars after a supernova explosion. These stellar corpses pack more mass than the Sun into a sphere just 20 kilometers across. Their gravity is so intense, it warps space and time itself.

More About Neutron Stars

Neutron stars can spin hundreds of times per second — these are called pulsars.
They’re composed almost entirely of neutrons packed tightly together.
They have magnetic fields trillions of times stronger than Earth’s.
Merging neutron stars produce gravitational waves and create elements like gold.