Understanding Cepheid Variables and RS Pup

What is the period of variability for the star RS Pup?

• 20 days

• 100 days

• 41 days

• 60 days

How do Cepheid variables help astronomers measure distances in the universe?

• By their size

• Using the period-luminosity relationship

• Through their temperature

• By their color

What makes RS Pup particularly special among Cepheid variables?

• It is near the tip of the period-luminosity relation

• It is located in the northern hemisphere

• It is the oldest known star

• It is the closest star to Earth

What is the mass of RS Pup compared to the Sun?

• 10 times more massive

• 20 times more massive

• 5 times more massive

• 15 times more massive

What phenomenon allows for precise distance measurements of RS Pup?

• Light echoes

• Magnetic fields

• Solar flares

• Gravitational lensing