The Corona
The
corona
of
the
Sun
is
a
layer
of
very
low
density
and
very
high
temperature.
How
is
it
that
the
corona,
the
outermost
layer
of
the
Sun,
could
be
the
hottest?
There
are
some
theories
.
From
regions
in
the
solar
atmosphere
called
coronal
holes
,
the
Sun
sends
the
solar
wind
out
into
the
solar
system.
The
corona
is
the
most of variable layer of the solar atmosphere, changing its general
shape
from solar minimum the solar maximum.