The Universe

What is the meaning of the word 'universe'?

• A. Combined into one

• B. A massive explosion

• C. A ball-shaped region

• D. A static space

What are the three types of substances that make up the universe?

• A. Normal matter, dark matter, and dark energy

• B. Stars, meteorites, and planets

• C. Atoms, matter, and issue

• D. Space, matter, and time

How old is the universe believed to be?

• A. 13.7 billion years

• B. 137 billion years

• C. 7 trillion light years

• D. Thousands of years

What is the estimated size of the observable universe?

• A. 93 billion light years in diameter

• B. 250 times larger than the observable universe

• C. 7 trillion light years across

• D. Billions of times bigger than the observable universe

What is the phenomenon known as inflation?

• A. The expansion of the universe

• B. The collapse of the universe

• C. The movement of galaxies

• D. The birth of the universe

Who discovered that the universe is expanding?

• A. Edwin Hubble

• B. Albert Einstein

• C. Isaac Newton

• D. Galileo Galilei

What is the likely fate of the universe?

• A. It will stop expanding and start collapsing

• B. It will continue to expand forever

• C. It will remain the same

• D. It will disappear

How many stars are estimated to be in the Milky Way?

• A. At least 100 billion

• B. At least 100 million

• C. At least 100 trillion

• D. At least 100 thousand

How many planets have been confirmed to exist beyond our solar system?

• A. More than 5,000

• B. More than 1,000

• C. More than 10,000

• D. More than 100,000

What is the estimated number of planets in our galaxy?

• A. Hundreds of billions

• B. Thousands

• C. Millions

• D. Billions