Big Bang Theory & Life Cycle of a Star

Front

What is the study of the universe called?

Back

Cosmology

Front

How wide is the universe approximately?

Back

91 Billion Light Years

Front

What is the process called when hydrogen gas changes into helium gas, releasing energy?

Back

Nuclear fusion

Front

What were the original two elements in our universe?

Back

Hydrogen and Helium

Front

What evidence supports the Big Bang Theory?

Back

The universe is expanding.

Front

What is the term for the initial explosion that created the universe?

Back

Big Bang

Front

What is a star?

Back

A massive celestial body made of gas that emits light and heat through nuclear fusion.

Front

What is a planetary nebula?

Back

A ring-shaped nebula formed by an expanding shell of gas around an aging star.

Front

What is luminosity?

Back

The total amount of energy emitted by a star per unit of time.

Front

What is the life cycle of a star?

Back

The stages a star goes through from formation to death, including nebula, main sequence, and supernova.