NATS 1745 Study Guide - Binary Star, Strong Gravity, Nuclear Reaction
17 Jan 2014
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Bernard lovell"s largest radio telescope in the world was completed. Multiple radio dishes (radio arrays) were combined to achieve the power of one enormous dish: describe the radio emission from a pulsar. Why/why not: named pulsars , these are neutron stars whose radio beams are periodically aimed at earth. After that was disproved, it crossed his mind that they could be looking at a deliberate signal from an extraterrestrial civilization: the true explanation for the pulses are energy emitted from neutron stars. Only a neutron star is dense enough to rotate quickly enough without tearing itself apart, so all pulsars are neutron stars. Earth, or if the neutron star is not rotating, or does not emit a beam, it is not seen as a pulsar. In visible light they look like star, that"s why we call them quasi-stellar but they are not really stars.
