One teaspoon of neutron star material weighs as much as what? Pick your spoon size and find out.
A neutron star is what's left when a star 10-20 times the mass of our Sun runs out of fuel and collapses. Gravity crushes protons and electrons together into neutrons, packing them so tightly that a teaspoon of this material — about 5 milliliters — would weigh roughly 4 billion tons on Earth. That's about 2,700 blue whales, or 14 times the total weight of every human on the planet.
The surface gravity of a neutron star is about 200 billion times Earth's. If you dropped a marshmallow from one meter above its surface, it would hit with the energy of a nuclear bomb. The escape velocity is about half the speed of light. The magnetic field is a trillion times stronger than Earth's — strong enough to strip every atom from your body from 1,000 kilometers away.
Data source: Neutron Star Structure Equation Models, NASA Astrophysics Data System. A typical neutron star is about 20 kilometers across — roughly the size of a city — but contains 1.4 solar masses. If you could somehow bring a spoonful to Earth, it would pierce the crust like a bullet through paper and keep going to the other side.
A neutron star is the collapsed core of a massive star that exploded as a supernova. It contains about 1.4 times the mass of our Sun, packed into a sphere about 20 kilometers across. That's like compressing Mount Everest into a sugar cube.
The gravity is so intense that electrons are crushed into protons, turning them into neutrons. That's why it's called a neutron star — it's essentially a giant atomic nucleus made almost entirely of neutrons. The density is roughly 10¹⁷ kg/m³. A teaspoon of neutron star material weighs about 4 billion tons. That's as heavy as Mount Everest.
If you somehow brought a teaspoon of neutron star material to Earth, it would fall through the ground like a stone through air. It wouldn't stop at the center — it would oscillate back and forth through the Earth's core until friction stopped it. The neutron star material would also immediately explode as the pressure released, obliterating everything within hundreds of kilometers. So don't bring one home.
The collapsed core of a massive star after a supernova. A teaspoon weighs ~4 billion tons because atoms are crushed into pure nuclear matter.
No. Its gravity would crush you before you got close. It would also sink through the Earth's crust toward the center.
About 20 km in diameter — roughly the size of a city — but containing 1.4 times the mass of the Sun.
The pressure holding it together would release instantly. It would explode with the force of billions of hydrogen bombs. The material would decompress into normal matter, releasing enormous energy. Don't try this at home.
We can detect them. Pulsars — rapidly rotating neutron stars — emit beams of radiation that sweep past Earth like a lighthouse. We detect regular pulses, down to millisecond precision. The first pulsar was discovered in 1967 by Jocelyn Bell Burnell.