The Big Bang Theory Unit 2024

Front

What does it mean when the spectrum from a galaxy is blue-shifted?

Back

The galaxy is moving toward us.

Front

What is the current scientifically estimated age of the universe?

Back

13.8 billion years.

Front

Approximately how many stars are in our universe?

Back

Trillions and trillions of stars.

Front

Which elements formed first after the Big Bang?

Back

Hydrogen and Helium.

Front

Approximately how many stars are in our galaxy?

Back

~250 billion.

Front

What is the Big Bang Theory?

Back

A scientific explanation for the origin of the universe, stating it began from a singularity and has been expanding ever since.

Front

What evidence supports the Big Bang Theory?

Back

Cosmic Microwave Background Radiation, redshift of galaxies, and abundance of light elements.

Front

What is redshift?

Back

The phenomenon where light from an object is shifted to longer wavelengths as it moves away from the observer.

Front

What is the significance of Cosmic Microwave Background Radiation?

Back

It is the afterglow radiation from the Big Bang, providing evidence of the universe's early hot state.

Front

What role do supernovae play in the universe?

Back

They are explosive deaths of stars that spread elements into space, contributing to the formation of new stars and planets.