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• At around 1,392,000 kilometers (865,000 miles)
wide,
• the Sun’s diameter is about 110 times wider than
Earth’s
Add. Info:
– the sun’s radius 696,000km
– the Earth’s radius is 6, 376km
689,624km
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Why do we need to study about
the Sun?
• extremely important for life on Earth
• The sun provides us with energy,
which brings life on our planet
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• Without the sun life on Earth would
not exist.
It would be so cold that
no living thing would
be able to survive and
our planet would be
completely frozen.
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• Because of the Sun’s huge influence on
Earth, many early cultures saw the Sun as
a deity or god.
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Radiative Zone
• Where energy is transported from
superhot interior to the colder outer layers
by photons.
• This also include the core.
• Includes the inner approximately 85% of
the Sun’s radius.
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Convective Zone
• Energy in the outer 15% of the sun’s
radius is transported by the bulk motion of
gas in a process called convection.
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Photosphere
• The Sun’s visible surface.
• The bubbling motion of the convection
layers makes the granular patterns we see
on the photosphere.