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Basic Facts about the Sun:

  1. Mass: 2 x 1033 grams = 333,000 Earths
  2. Diameter: 1,392,000 km = 109 Earths = 10 Jupiters
  3. Age: 4.6 billion years
  4. Rotation Period: 25 days at equator, 36 at poles (at surface)
  5. Luminosity: 3.83 x 1033 ergs per second, 1370 W/m2
  6. Temperature: 15 million K at core, 5770 at "surface"
  7. Density: 8 x gold at the core, average ~ 1.5 water
  8. Magnetic Field: 1-2 Gauss, 1000ís in sunspots
  9. Composition: 72% (92.1%) H, 25% (7.8%) He, "metals"


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