However, Gold surmised that they were simply rapidly rotating neutron stars.  
Thomas Gold correctly specified the class to which these objects belonged after their discovery.  That discovery had labeled them LGMs, or Little Green Men, because of an incorrect assumption that they were created by extraterrestrials.  That mistake was made in 1967 by Hewish and Bell, who first observed them.  However, Gold surmised that they were simply rapidly rotating neutron stars.  FTP, identify these astronomical bodies whose name derives from their consistent expulsion of radiation every few seconds or milliseconds.
Thomas Gold correctly specified the class to which these objects belonged after their discovery.  
pulsars or pulsating radio star