- The model
is certainly somewhat out of date since it was made in
But qualitatively and to a degree quantitatively, it should still be OK.
- The horizontal axis is temperature
(in kelvins) at the
bottom and density
(in g/cm**3) at the top.
Both thermodynamic variables (AKA state functions)
are plotted with
Note the gram per cubic
centimeter is the
for life as we know it
since that depends on liquid water
whose density is always close to
- The vertical axis is height (in kilometers)
measured from a zero-point set at the top of the
solar photosphere layer.
The scale is NOT a logarithmic scale.
- The model shows, going outward,
the interior (more exactly the convective zone),
- The absorption line spectrum
of the Sun probably mainly forms
in the lower chromosphere
at ∼ 500 km above the
solar photosphere where the
temperature reaches a minimum of ∼ 4100 K.
(see Wikipedia: Sun's atmosphere).
- Spicules are jets
in the chromosphere.
They are a feature of
- See also Sun keywords
(local link /
general link: keywords_sun.html):