Contemporary Cosmologies (Leaving Cert Religious Education): Flashcards
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What is cosmology?
What is cosmology?
Scientific explanation of universe origin, structure & development
Who first proposed Big Bang theory (1920s)?
Who first proposed Big Bang theory (1920s)?
Georges Lemaître - Belgian Catholic priest & physicist
Age of universe according to Big Bang
Age of universe according to Big Bang
~13.8 billion years
Origin point in Big Bang theory
Origin point in Big Bang theory
Extremely dense & hot single point that rapidly expanded
Evidence 1 for Big Bang: galaxy movement
Evidence 1 for Big Bang: galaxy movement
Redshift - galaxies moving away, universe expanding (Hubble's Law)
Evidence 2 for Big Bang: discovered 1965
Evidence 2 for Big Bang: discovered 1965
Cosmic Microwave Background Radiation (CMB) - early universe glow
Evidence 3 for Big Bang: element proportions
Evidence 3 for Big Bang: element proportions
Abundance of light elements (H & He) matches predictions
Year & proposers of Steady State theory
Year & proposers of Steady State theory
1948: Fred Hoyle, Hermann Bondi & Thomas Gold
Core principle: Steady State universe
Core principle: Steady State universe
Eternal, no beginning/end, unchanging overall
How Steady State maintains constant density
How Steady State maintains constant density
New matter continuously created as universe expands
Discovery that contradicted Steady State (1965)
Discovery that contradicted Steady State (1965)
Cosmic Microwave Background Radiation (CMB)
Current scientific status: Big Bang vs Steady State
Current scientific status: Big Bang vs Steady State
Big Bang widely accepted; Steady State largely rejected
Pope Pius XII's 1951 declaration on Big Bang
Pope Pius XII's 1951 declaration on Big Bang
Aligned with Catholic teaching
Theological concept compatible with Big Bang
Theological concept compatible with Big Bang
Creation ex nihilo (creation from nothing)