THEORIES

Question 1

Top prevailing cosmological model for the early development of the universe

Answer 1

Big bang theory

Question 2

thermal radiation used in observational cosmology, oldest light in the universe

Answer 2

Cosmic Microwave Background

Question 3

rapidly expanding bubble of pure vacuum energy

Alan Guth and Andrei Linde

Answer 3

Cosmic Inflation theory

Question 4

always expanding

Sir James Hopwood Jeans in 1920

Answer 4

Steady state theory

Question 5

small number of stars that orbit each other

Answer 5

Stellar system

Question 6

rotating cloud of gas called nebula

Immanuel Kant and Pierre-Simon Laplace

Answer 6

Nebular Hypothesis

Question 7

planets were formed from the accretion of small space bodies

proposed by Viktor S. Safronov, developed by T.c Chamberlin and F.R Moulton

Answer 7

Planetsimal Theory

Question 8

a star passed closed to the sun, effect of gravitational pull between the passing star and the sun

developed by James Jeans and sir Harold Jeffreys

Answer 8

Tidal Theory