Consider the following pairs : Objects in space : Description 1. Cepheids : Giant clouds of dust and gas in space 2. Nebulae : Stars which brighten and dim periodically 3. Pulsars : Neutron stars that are formed when massive stars run out of fuel and collapse How many of the above pairs are correctly matched?
a
Only one
b
Only two
c
All three
d
None
AstronomyStellar Objects & Cosmic PhenomenaCepheidsNebulaePulsarsGiant clouds of dust and gasStars which brighten and dim periodicallyNeutron starsmassive stars