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extends the full length of the earth and passes through
the horn of the shadow to the middle of the moon,
which goes here and there, then each month it crosses the line
several times. Then it falls into the shadow that everywhere
stops the brightness of the sun from reaching it, so that
it cannot receive this brightness at all. And the further it is from the
line, the more its brightness decreases. In this way one
can sometimes see the moon disappear in the middle
of its month when it is the fullest, and its brightness will
become dark during one night but will then be regained,
as you can well understand by the figure that follows.
[rubric] Of the eclipse of the sun [/rubric]

It happens that
the sun sometimes
loses its brightness
in broad day,
and indeed
this happens in the
middle of
the day. For it
is like the decrease
that is called
"eclipse"
in Latin. This eclipse occurs due to a lack of light.