Podcast
Play an AI-generated podcast conversation about this lesson
Questions and Answers
What determines the lifetime of a main-sequence star?
What determines the lifetime of a main-sequence star?
- The rate at which it burns its hydrogen supply (correct)
- The temperature of its surface
- Its distance from the Earth
- The size of its planetary system
What is the relationship between the mass and luminosity of a main-sequence star?
What is the relationship between the mass and luminosity of a main-sequence star?
- Luminosity is proportional to the square root of mass
- Luminosity is proportional to the cube and a half of mass (correct)
- Luminosity increases linearly with mass
- Luminosity increases exponentially with mass
How does the lifetime of a 10 M⊙ star compare to that of the Sun?
How does the lifetime of a 10 M⊙ star compare to that of the Sun?
- It is about 10 times longer
- It is about 30 million years, whereas the Sun's is about 10 billion years (correct)
- It is about 100 times shorter
- It is about the same
What can be inferred about a star from its luminosity?
What can be inferred about a star from its luminosity?
Signup and view all the answers
What is the approximate lifetime of a star with a mass of 3 Rsun?
What is the approximate lifetime of a star with a mass of 3 Rsun?
Signup and view all the answers
What is the primary reason why molecular clouds can form hydrogen molecules?
What is the primary reason why molecular clouds can form hydrogen molecules?
Signup and view all the answers
Why does the cloud contract and form a dense, hot protostar?
Why does the cloud contract and form a dense, hot protostar?
Signup and view all the answers
What is the primary factor that determines the mass limit of main sequence stars?
What is the primary factor that determines the mass limit of main sequence stars?
Signup and view all the answers
What is the main characteristic of brown dwarfs that distinguishes them from main sequence stars?
What is the main characteristic of brown dwarfs that distinguishes them from main sequence stars?
Signup and view all the answers
What is the primary effect of a large star's mass on its nuclear fusion rate?
What is the primary effect of a large star's mass on its nuclear fusion rate?
Signup and view all the answers
