What is cosmology?

• The study of Earth's atmosphere

• The study of the universe as a single physical object

• The study of stars and planets

• The study of human evolution

Who discovered that the universe is expanding?

• Galileo Galilei

• Edwin Hubble

• Isaac Newton

• Albert Einstein

What percentage of the universe is made up of dark energy according to the PANTHEON+ survey?

• 33.8%

• 70%

• 66.2%

• 50%

When was dark matter discovered?

• In the 2000s

• In the 1920s

• In the 1970s

• In the 1990s

What is the main challenge in understanding dark matter and dark energy?

• We know their properties but not their identities

• They are visible only through telescopes

• They are too small to be detected

• They are only theoretical concepts