What is a Pulsar and Why are they Incredibly Deadly? Pulsars are one of the most energetic and deadly death rays that exist in the universe, and you know what makes them even worse? When they are pointed at Earth. First things first is laying down the definition of a pulsar. A pulsar is basically the endpoint of a stellar evolution. Think of a star, at least 8 times bigger and no more than 50 times bigger than our Sun, that spends its happy life fusing atoms and burning up oxygen, helium, hydrogen and so on. Then near the end of its life it gets to a point where it exceeds the Chandrasekhar limit and the star collapses upon itself and exerting most of its energy and mass outward until it is halted by a neutron degeneracy and all that’s left is a dense neutron star. These neutron stars are only about 13 km in radius and spins 642 times per second! But then something...