How We Know The Universe is Ancient

What was the early belief about the universe's nature?

• It was shrinking over time.

• It was constantly changing.

• It was static and unchanging.

• It was expanding rapidly.

What did Vesto Slifer discover about spiral nebulae?

• They were orbiting the Milky Way.

• They were moving away from us.

• They were stationary.

• They were moving towards us.

Who coined the term 'Big Bang'?

• Albert Einstein

• George Lamatre

• Fred Hoyle

• Edwin Hubble

What is the Hubble constant used for?

• Predicting the future of the universe

• Determining the size of galaxies

• Calculating the age of the universe

• Measuring the speed of light

What mistake did Edwin Hubble make in his calculations?

• He overestimated the distance to galaxies.

• He underestimated the brightness of stars.

• He ignored the effect of dark energy.

• He confused two types of Cepheid variables.

What did Alan Sandage correct in the age estimation of the universe?

• The speed of light

• The Hubble constant

• The type of stars used for measurement

• The gravitational effect of dark matter

What is the current accepted age of the universe?

• 12.5 billion years

• 13.8 billion years

• 15 billion years

• 10.5 billion years

What role does dark energy play in the universe's expansion?

• It slows down the expansion.

• It speeds up the expansion.

• It has no effect on the expansion.

• It reverses the expansion.

What is the cosmic microwave background radiation?

• The light from the first stars

• The oldest light we can see

• The glow from the Milky Way

• The radiation from black holes

How do astronomers use the cosmic microwave background radiation?

• To predict future cosmic events

• To determine the universe's age

• To calculate the universe's mass

• To measure the speed of galaxies