Ptolemy

Astronomy Roman-Egyptian 100 – 170 368 quotes

Geocentric model dominated astronomy for 1400 years

Quotes by Ptolemy

The true astronomer is a philosopher.

Almagest 150

The celestial sphere is the most perfect of all bodies.

Almagest 150

The motion of the stars is eternal and unchanging.

Almagest 150

The planets wander through the heavens.

Almagest 150

The sun is the source of light and life.

Almagest 150

The moon governs the tides.

Almagest 150

The stars influence human destiny.

Tetrabiblos 150

Astrology is a noble art, when practiced with wisdom.

Tetrabiblos 150

The heavens are a mirror of the earth.

Tetrabiblos 150

The wise man observes the heavens and learns from them.

Tetrabiblos 150

I know that I am mortal by nature, and ephemeral; but when I trace at my pleasure the windings to and fro of the heavenly bodies, I no longer touch earth with my feet: I stand in the presence of Zeus himself and take my fill of ambrosia.

Almagest 150

The heavens themselves run perpetually without beginning or end, and with perfect order.

Almagest 150

Mathematics is the science from which all other sciences derive their principles.

Almagest 150

The Earth is a sphere placed immobile at the center of the universe.

Almagest 150

Stars are like points of fire, fixed in the crystalline sphere.

Almagest 150

The motion of the planets is explained by epicycles upon deferents.

Almagest 150

Observation is the foundation of astronomy; without it, theory is but conjecture.

Almagest 150

The equinoxes precess due to the slow wobble of the Earth's axis.

Almagest 150

In geography, the habitable world is but a small part of the great sphere.

Geography 150

Astrology reveals the influences of the stars upon human affairs.

Tetrabiblos 150