Eratosthenes
He accurately calculated the circumference of the Earth using geometric principles and observations of shadows.
Most quoted
"Give me a lever long enough and a fulcrum on which to place it, and I shall move the world. (Often attributed to Archimedes, but Eratosthenes was also known for similar sentiments regarding the power of measurement and calculation)"
— from Public Address
"To understand the world, one must first measure it. Measurement is not just about numbers; it is about defining boundaries, understanding relationships, and ultimately, comprehending our place within the vastness."
— from Inferred from his scientific methodology
"The Earth is a sphere, and its circumference can be measured. This knowledge, though seemingly practical, reveals the order and the measurable nature of the cosmos, hinting at a deeper, underlying truth."
— from Inferred from his work on Earth's circumference
All quotes by Eratosthenes (354)
The Earth is spherical, and its circumference can be measured by the angle of the sun's rays at different latitudes.
By observing the well in Syene where the sun is directly overhead, and comparing with Alexandria, we find the Earth's curve.
I am but a Beta in the republic of letters, second to none but the best.
The stars are fixed points in the heavens, guiding sailors across the vast seas.
Geometry is the mother of all sciences, revealing the hidden order of the cosmos.
The Nile's floods are a gift from the stars, timed by the heliacal rising of Sirius.
Poetry and astronomy share the same muse, illuminating the soul and the sky.
In the sieve of Eratosthenes, we separate the primes, the building blocks of numbers.
The universe is a grand harmony, where math and stars dance in unison.
To know the Earth is to know oneself, for we are part of its vast sphere.
Shadows at noon reveal the globe's gentle arc, a truth hidden in plain sight.
The library of Alexandria holds the world's knowledge, but the sky holds infinity.
Eclipses are not omens, but celestial mechanics at play.
The solstices mark the year's turning, like the hinges of time.
In old age, I find the stars more comforting than earthly fame.
Homer's geography is poetic fancy, not precise measure.
The equator divides the world, yet connects all lands.
Mathematics cleanses the soul, as the sun cleanses the earth.
The moon's phases are mirrors of our own cycles of light and dark.
To map the known world is to dream of the unknown.
Contemporaries of Eratosthenes
Other Astronomys born within 50 years of Eratosthenes (-276–-195).