Exploring Cosmic Distances

What is the cosmic distance ladder?

• A method to measure distances in the universe

• A technique to climb mountains

• A method to measure distances using physical objects

• A tool used by astronauts to reach the moon

What is parallax used for in astronomy?

• To measure the brightness of stars

• To calculate the distance to nearby celestial objects

• To determine the color of planets

• To find the temperature of stars

Who used parallax to measure the distance to the moon?

• Hipparchus

• Galileo Galilei

• Isaac Newton

• Albert Einstein

What are Cepheid variables used for?

• To measure cosmic distances

• To determine the age of the universe

• To measure the mass of planets

• To calculate the speed of light

Who discovered the relationship between Cepheid variables' pulsing and brightness?

• Edwin Hubble

• Vesto Slipher

• Giovanni Cassini

• Henrietta Leavitt

What does the Doppler effect explain in astronomy?

• The mass of galaxies

• The temperature of planets

• The expansion of the universe

• The color of stars

What did Hubble discover about distant galaxies?

• They are moving towards us

• They are shrinking

• They are stationary

• They are moving away from us

What are supernovae used for in cosmic measurements?

• As standard candles for measuring vast distances

• To determine the age of the universe

• To calculate the speed of light

• To measure the temperature of stars

What surprising discovery was made about the universe's expansion?

• It is slowing down

• It has stopped

• It is reversing

• It is accelerating

What is the significance of the cosmic distance ladder?

• It helps measure distances within our solar system only

• It provides a method to measure distances across the universe

• It is a tool for measuring the speed of light

• It is used to calculate the mass of galaxies