Steady_State_Theory.pptx theory about the universe

this is a presentation about the universe

1. Steady State Theory l

2. The steady state theory suggests that the universe has always been here and will always be present. The universe has no beginning and no end . It also suggests that the universe always looks the same in any time or space , but the universe continuously expands while simultaneously creating matter.

3. During expansion , the density of the universe remains constant; hence, the name steady state. It also explains that the rate of the death of stars is equal to the rate of birth of stars; hence , as a whole, the universe is not evolving over time.

4. Fig.1 The expansion of the universe while maintaining constant density according to the steady state theory

5. The steady state theory was proposed by Hermann Bondi, Thomas Gold, and Fred Hoyle in 1948.

6. These three men were all physicists from Cambridge who submitted two papers to Monthly Notices of the Royal Astronomical Society , one from Bondi and Gold and the other one from Hoyle.

7. How did Bondi and Gold come up with the idea of the steady state theory?

8. The steady state idea of Bondi and Gold may have started when they watched a movie together late 1940s. It was a horror movie which started and ended in the same way. The circular plot of the movie inspired them to suggest that probably the universe was dynamic but unchanging.

9. The steady state theory was so simple that it was widely accepted even before the proposal of the big bang theory. However , other astronomers did not favor this theory since it did not follow the law of conservation of energy and mass .

10. The Rejection of the Steady State Theory

11. The discovery of the cosmic microwave background radiation significantly supported the explanations given by the big bang theory and led many scientists to reject the steady state theory in 1965. The steady state theory explained that the cosmic radiation was a result of a supernova. However, after thorough research, it was proven that the radiation is equal in any direction of the universe and could not be a result of many supernovae .

12. Monthly Notices of the Royal Astronomical Society A peer-reviewed scientific journal covering research in astronomy and astrophysics.