What are the two primary theories proposed for the sun's heat generation?
Understand the Problem
The question is asking about the primary theories explaining how the sun generates heat. It seems to be a factual knowledge question related to astrophysics.
Answer
Nuclear fusion and gravitational energy.
The two primary theories proposed for the sun's heat generation are nuclear fusion and gravitational energy.
Answer for screen readers
The two primary theories proposed for the sun's heat generation are nuclear fusion and gravitational energy.
More Information
Nuclear fusion is the process that powers the Sun today, where hydrogen nuclei combine to form helium. Historically, before the understanding of nuclear fusion, gravitational contraction was considered as a potential source of energy, as proposed by Kelvin-Helmholtz.
Tips
A common mistake is confusing older gravitational theories with modern nuclear fusion processes, understanding both is crucial.
Sources
- 16.1 Sources of Sunshine: Thermal and Gravitational Energy - openstax.org
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