Big Bang Review

Front

What is the Cosmic Microwave Background (CMB)?

Back

The CMB is the afterglow radiation from the Big Bang, filling the universe and providing evidence for the Big Bang theory.

Front

What does redshift indicate about a galaxy's movement?

Back

Redshift indicates that a galaxy is moving away from Earth, causing the light waves to stretch and appear more red.

Front

What is blueshift?

Back

Blueshift occurs when an object in space is moving towards an observer, causing the light waves to compress and appear more blue.

Front

What is the Doppler effect?

Back

The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.

Front

What evidence supports the Big Bang theory?

Back

Key evidence includes the Cosmic Microwave Background (CMB) radiation and the observed redshift of distant galaxies.

Front

How does the wavelength of light change when a galaxy moves away from Earth?

Back

The wavelength of light is stretched, resulting in a redshift.

Front

What is the significance of the Andromeda galaxy in relation to the Milky Way?

Back

The Andromeda galaxy is on a collision course with the Milky Way, moving towards it.

Front

What does it mean if a galaxy is described as 'moving away from us more slowly'?

Back

It means that the galaxy's redshift is less pronounced compared to other galaxies, indicating a slower rate of recession.

Front

What is the relationship between the speed of a galaxy and its redshift?

Back

The greater the redshift, the faster the galaxy is moving away from us.

Front

What is the observable universe?

Back

The observable universe is the part of the universe that we can see and measure, limited by the speed of light and the age of the universe.