Aristotle
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Astronomy/
Model of
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Aristotle was born
in 384 B.C. in
Stagira in
northern Greece.
-Aristotle
His father,
Nicomachus, was the
personal physician to
King Amyntas of
Macedon
-Aristotle
Both of Aristotle's
parents died when he
was about thirteen,
and Proxenus of
Atarneus became his
guardian
-Aristotle
Aristotle moved to
Athens to continue his
education at Plato's
Academy
-Aristotle
Aristotle was invited
by Philip II of
Macedon to become
the tutor to his son
Alexander
-Aristotle
Aristotle's
Contribution in
Astronomy/Cosmology
Aristotle contributed a geocentric model for
the universe, in 4C BC.with Moon, Mercury,
Venus, Sun, Mars, Jupiter and Saturn moving
around the Earth, with fixed stars beyond.
He thought Earth was the center of the
universe and that the Sun, Moon, planets,
and all the fixed stars revolved around i
The Earth is at the Center
of the Universe
The Sun, Moon and the
planets move around the
Earth on crystal spheres
(the sphere was
considered to be a
perfect shape)
The stars are on a single
sphere that was just
beyond the orbits of the
planets.
The universe remains
unchanged since it was
created.
Aristotle contributed the discovery that the
Earth was round.
Evidences
Lunar Eclipse
One of the strongest pieces of evidence of
the shape of the Earth came through
interpretation of a lunar eclipse. During an
eclipse we see the shadow of the Earth on
the moon. This looks like the image at the
top. If the Earth were triangular, one would
expect the shadow of the Earth to look like
a triangle
Distance of a Ship
One of the other key pieces of evidence for
a round Earth was the fact that at a
distance one can see the top of a ship
before seeing the rest of it. One can find
this concept illustrated in a wide array of
astronomical texts throughout history
Star Formation
One of the other key pieces of evidence for
a round Earth was the formation of the
stars.
Cosmology
In Aristotle's Cosmology,
each of these four
elements (earth, water, fire
and air) had a weight.
Earth was the heaviest,
water less so, and air and
fire the lightest.
According to Aristotle the
lighter substances moved
away from the center of
the universe and the
heaver elements settled
into the center
References
Dylan Campbell. Aristotle’s
On the Heavens. World History
Encyclopedia. Retrieved April
28, 2023 from
https://www.worldhistory.org
/article/959/aristotles-onthe-heavens/.
Thank You
for listening!
"All men naturally desire
knowledge"
-Aristotle