Neutrons, like electrons, must follow the laws of quantum mechanics. In particular, they must obey the Pauli exclusion principle, as outlined in last Monday's lecture . The interior structure of a neutron star is highly uncertain. Well, they may be small, but they are also hot. We can hunt for hot neutron stars by looking for X-ray sources.
Some neutron stars, however, also emit electromagnetic radiation by another mechanism.
Read on to learn about pulsars . Pulsars are neutron stars which emit beams of radiation. Some neutron stars appear to emit regular pulses of electromagnetic radiation. When we are able to detect these pulses here on Earth, we refer to the neutron star which emits them as a pulsar . The first pulsar discovery occurred in 1967, when astronomers in England, while making a survey of the sky at radio wavelengths, discovered pulses coming from one particular position.