The writings of the ancient Greek scholar Aristotle (384-322 BCE) summarize many of the ideas of his day. They describe how the progression of the Moon's
phases-its apparent changing shape-results from our seeing different
portions of the Moon's sunlit hemisphere as the month goes by.
Lunar eclipses happen when the Earth's shadow falls on the Moon. As the
Moon enters or emerges from Earth's shadow during an eclipse of the Moon,
the shape of the shadow seen on the Moon is always round.
COLO)
Aristotle used this as evidence
for the size of the Earth.
that the Earth was round.
that the Sun was between the Earth and Moon.
O
that Venus was between the Earth and the Sun.