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The Sun

  • Why is the Sun round?
  • Will the Sun ever stop shining?
  • What happens during a solar eclipse?
  • Why are sunspots darker than the rest of the Sun?
  • How big is a sunspot?
  • Why does the Sun have spots?
  • Does the Sun move in space?
  • Does the Sun spin?
  • How far away is the Sun?
  • How hot is the Sun?
  • Is the Sun the largest star?
  • How large is the Sun compared to Earth?
  • What is the Sun made of?
  • How long has the Sun been shining?
  • How does the Sun shine?
  • What is the Sun?

How long has the Sun been shining?

The Sun has been shining for about 4.6 billion years and it will continue to shine for about 5 billion more years.


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Cool Cosmos is an IPAC website. Based on Government Sponsored Research NAS7-03001 and NNN12AA01C.