Exploring the Expansion of the Universe

The video explores the nature of the Universe, tracing the evolution of cosmology from early static models to the Big Bang theory. It discusses key discoveries like redshift and cosmic microwave background, which support the expanding Universe model. The video explains how these observations led to the understanding that the Universe is 13.82 billion years old, emphasizing the role of space expansion rather than galaxies moving through space.

What initiated the study of cosmology?

• The discovery of galaxies

• The need to understand the cosmos

• The invention of the telescope

• The Big Bang theory

Who confirmed Earth's ancient age through its cooling process?

• Edwin Hubble

• Lord Kelvin

• Albert Einstein

• Vesto Slipher

What did Vesto Slipher's observations of spiral nebulae reveal?

• They were not galaxies

• They were highly redshifted

• They were moving towards us

• They were static

Who proposed the Universe was expanding based on redshifts observed?

• Georges Lemaître

• Albert Einstein

• Alexander Friedmann

• Both A and C

What does the redshift of distant galaxies indicate?

• The Universe is contracting

• The Universe is static

• The Universe is expanding

• Galaxies are moving towards us

What was the 'cosmic egg' according to Lemaître?

• A static Universe model

• A galaxy

• A black hole

• The initial state of the Universe

What did the cosmic microwave background confirm?

• The Universe is infinite

• The Big Bang theory

• Galaxies are static

• The static Universe model

What does the Big Bang model predict about the early Universe?

• It was dense and hot

• It was expanding into another universe

• It contained only black holes

• It was cold and empty

How does the expansion of the Universe work according to modern understanding?

• Galaxies are moving through space

• Space itself is expanding

• The Universe is contracting

• The Universe is static

What is the current best measurement of the Universe's age?

• 13.82 billion years

• 4.5 billion years

• 20 billion years

• 9.8 billion years