Consider the following pairs:
Objects in Description
space
- Cepheids Giant clouds of dust and gas in space
- Nebulae Stars which brighten and
dim periodically
- 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
ANS .D
- A nebula is a giant cloud of dust and gas in space
- Cepheids, also called Cepheid Variables, are stars which brigthen and dim periodically
- Pulsars are rapidly rotating neutron stars that blast out pulses of radiation at regular intervals ranging from seconds to milliseconds. So they are neutron star but given definition in question is of Neutron star not of Pulsa