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Questions and Answers
What is the primary mechanism by which the Sun generates its energy?
What is the primary mechanism by which the Sun generates its energy?
- Helium flash
- Triple-alpha process
- CNO cycle
- Proton-proton chain reaction (correct)
Which of the following types of celestial objects is thought to be responsible for the reionization of the universe?
Which of the following types of celestial objects is thought to be responsible for the reionization of the universe?
- Active galactic nuclei
- Quasars
- Blazars
- First-generation stars (correct)
What is the approximate ratio of the mass of the Milky Way's central black hole to the mass of the Sun?
What is the approximate ratio of the mass of the Milky Way's central black hole to the mass of the Sun?
- 1:100
- 4:1
- 1:4 (correct)
- 1:1000
What is the name of the process by which the solar wind interacts with the interstellar medium?
What is the name of the process by which the solar wind interacts with the interstellar medium?
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What is the term for the hypothetical form of matter thought to make up approximately 27% of the universe's total mass-energy density?
What is the term for the hypothetical form of matter thought to make up approximately 27% of the universe's total mass-energy density?
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Study Notes
Energy Generation in the Sun
- The Sun generates its energy primarily through a mechanism involving nuclear reactions in its core.
Reionization of the Universe
- Celestial objects thought to be responsible for the reionization of the universe are quasars.
Milky Way's Central Black Hole
- The mass of the Milky Way's central black hole is approximately 4 million times the mass of the Sun.
Solar Wind Interaction
- The process by which the solar wind interacts with the interstellar medium is called bow shock.
Dark Matter
- Dark matter is the hypothetical form of matter thought to make up approximately 27% of the universe's total mass-energy density.
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