Universe

The video tutorial explores the universe, explaining its vastness and components like planets, stars, and galaxies. It describes the structure of solar systems and galaxies, emphasizing the Milky Way. The concept of light years is introduced to measure the universe's size, highlighting its continuous expansion. The Big Bang theory is discussed as the origin of the universe, detailing the initial explosion and subsequent cooling that led to the formation of galaxies, stars, and planets. The video concludes by prompting viewers to consider how scientists determine the universe's age.

How do astronomers measure the size of the universe?

What happens to the universe as it continues to expand?

How do scientists estimate the age of the universe?