Consider the following pairs: How many of the above pairs are correctly matched? 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
Options
(a)Only one
(b)Only two
(c)All three
(d)None
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Class 11The Origin and Evolution of the Earth— NCERT Geography, Chapter 2. Early theories explained only the earth and planets: the nebular hypothesis of Kant, revised by Laplace (1796) and again by Otto Schmidt and Carl Weizsäcker (1950), had…
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