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10236166
The Past
Descrição
Western Australian Certificate of Education Physics (Cosmology) Mapa Mental sobre The Past, criado por Selina Koo em 07-09-2017.
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the past
history
big bang theory
steady state theory
physics
cosmology
physics
cosmology
western australian certificate of education
Mapa Mental por
Selina Koo
, atualizado more than 1 year ago
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Criado por
Selina Koo
aproximadamente 7 anos atrás
23
0
0
Resumo de Recurso
The Past
The Big Bang Theory
The universe started off as an infinitely small, hot, dense 'dot'
The universe is continuously expanding
Evidence for the Big Bang Theory
Hubble's Law
The galaxy appears to be moving away at speeds proportional to distance
When we say the galaxy is moving away we mean the space around it
Space is moving and therefore the galaxy is moving with it
Hubble's Law says that the further away the galaxy is, the faster it's moving
V = Hd
H: Hubble's constant
70 kmsMPc^-1
Remnants of the heat
If the universe started as a hot, dense 'dot' there should be remnants of that heat
Cosmic microwave background radiation
The abundance of 'light' elements
i.e. Hydrogen and Helium
The light elements form to make heavier elements
Need more light to make heavy
The Steady State Theory
Postulates of the Steady State Theory
The universe is infinitely big
The universe has always existed
The universe is constant
Expansion of the universe
Agrees that the universe is expanding
Claims that new matter gets created so the density remains the same
Did not explain cosmic microwave background radiation
Doesn't account for quasars
Quasars are young and exist in far galaxies
Steady State Theory says you should be able to see them in near and far galaxies
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