- Which is the closest known star to the Sun?
- Which is the closest known star with a terrestrial planet?
- What is the solar thermostat?
- How long does it take light to get out from the inside of the Sun?
- What is the p-p chain reaction?
- What is the solar neutrino problem?
- How was this problem solved?
- What element is being formed in the Sun?
- What is the expected lifetime of the Sun?
- What is a sunspot?
Hint: use the Internet
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