Exploring the Universe: A Journey Through Cosmology

What does a telescope allow us to do in terms of observing the universe?

• View events from the past

• Communicate with extraterrestrial life

• See into the future

• Observe distant stars as they are today

What did Edwin Hubble discover about galaxies?

• They are stationary

• They are shrinking

• They are moving towards each other

• They are moving away from each other

In the analogy of ants on a balloon, what does the balloon represent?

• A star

• The universe

• A planet

• A galaxy

How does the distance of a galaxy relate to its speed of recession?

• Farther galaxies move faster

• Closer galaxies move faster

• Farther galaxies move slower

• Distance does not affect speed

What is the Doppler effect in the context of light from galaxies?

• A change in light speed due to gravity

• A change in light frequency due to motion

• A change in light color due to temperature

• A change in light intensity due to distance

What does a redshift in a galaxy's light indicate?

• The galaxy is moving away from us

• The galaxy is changing size

• The galaxy is stationary

• The galaxy is moving towards us

What is the cosmological redshift?

• A shift in light due to galaxy rotation

• A shift in light due to the expansion of space

• A shift in light due to star formation

• A shift in light due to black holes

What causes the appearance of galaxies receding from each other?

• The galaxies are shrinking

• The galaxies are changing color

• The space between them is expanding

• The galaxies are getting heavier

What is the relationship between redshift and galaxy velocity?

• Redshift indicates a stationary galaxy

• Greater redshift means faster velocity

• Greater redshift means slower velocity

• Redshift is unrelated to velocity

What is the significance of the expansion of space in cosmology?

• It causes galaxies to collide

• It leads to the shrinking of the universe

• It results in the formation of new stars

• It explains the receding appearance of galaxies