Neutron stars are formed by the gravitational collapse of other massive stars but their mass is not enough to form a black hole.
- They are among the tiniest objects known in the universe(~10-13 kilometer radius).
- Have a mass of a few times that of the sun! (~1.4-2 solar masses).
- They spin around as rapidly as 700 times a second. That’s ~42,000 times a minute.
- Have a density of 3.7×10^17 to 5.9×10^17 kg/m^3. That’s approx 10^14 times more dense than the sun, comparable the the density of an atomic nucleus!
- This density is approximately equivalent to the mass of a Boeing 747 compressed to the size of a small grain of sand.
- One teaspoon of the material of a neutron star would weigh 5 billion tonnes. That’s more than the weight of everyone on the earth combined!