Expanding Universe Flashcard

Front

What is the observable universe?

Back

The observable universe is the part we can see from Earth, and it expands as space and time do.

Front

What does cosmic microwave background radiation signify?

Back

It provides evidence for the Big Bang theory and helps us understand the early universe.

Front

What is the Big Bang?

Back

The initial explosion that resulted in the formation and expansion of the universe.

Front

List the stars from coolest to hottest.

Back

Red, Yellow, White, Blue.

Front

What is cosmic microwave background radiation?

Back

Residual radiation from the Big Bang, provides evidence for the Big Bang theory.

Front

How does the expansion of the universe affect galaxies?

Back

Galaxies are moving away from each other as space itself expands.

Front

What is redshift?

Back

Redshift is the phenomenon where light from distant galaxies shifts to longer wavelengths, indicating they are moving away from us.

Front

What is dark matter?

Back

Dark matter is a form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects.

Front

What is the significance of the Hubble Space Telescope?

Back

It has provided crucial data supporting the expansion of the universe and the existence of distant galaxies.

Front

What is the role of gravity in the universe?

Back

Gravity is the force that holds galaxies, stars, and planets together and influences their motion.