It is uncertain but variously ascribed to Pythagoras, Parmenides and Empedocles by their later promoters.
Because during a lunar eclipse, Aristotle observed that the shape of the earth was round.
It always casts a curved shadow during a lunar eclipse
Aristotle observed that during a lunar eclipse, the shape of the Earth's shadow on the moon was curved. He reasoned that only a spherical object could cast a curved shadow, leading him to believe that the Earth was round. Additionally, Aristotle noted that as ships sail away from the shore, the hull disappears before the mast, suggesting the curvature of the Earth.
Newton concluded that the combination of the gravitational force between the Earth and the Sun, and the Earth's inertia moving it in a straight line, keep the Earth in orbit around the Sun.
A boat at sea, alone, does not prove that is earth is round. However, boats can be used to prove that earth is round. This is because if the earth was flat, eventually a boat would sail to the end of earth and fall off the edge. This has never happened, so it can be inferred that the earth is round. Also, a boat can sail all the way around the world and end up right where it started, which proves that the earth is round.
Because during a lunar eclipse, Aristotle observed that the shape of the earth was round.
The Greek scientist who concluded that Earth was round was Pythagoras, around the 6th century BC. He based his conclusion on observations of the stars and their positions in the sky.
The Greek scientist who concluded that the Earth was round was Pythagoras, around the 6th century BC. His observations of the shape of the Earth influenced later scholars like Aristotle and Eratosthenes.
It always casts a curved shadow during a lunar eclipse
Aristotle observed that during a lunar eclipse, the shape of the Earth's shadow on the moon was curved. He reasoned that only a spherical object could cast a curved shadow, leading him to believe that the Earth was round. Additionally, Aristotle noted that as ships sail away from the shore, the hull disappears before the mast, suggesting the curvature of the Earth.
Your mom. It was your mom who concluded it.
Any early man that could use common sense would have figured that one out.
That the Earth is round was known to ancient cultures but this knowledge was suppressed in Europe, mainly by the Catholic Church whose dogma insisted that Earth was the centre of the cosmos and lay under Heaven and above Hell. This is surprising since some of the best thinkers in Europe were clerics and monks within the Catholic Church.
Newton concluded that the combination of the gravitational force between the Earth and the Sun, and the Earth's inertia moving it in a straight line, keep the Earth in orbit around the Sun.
umm: "The Earth is round"? ------------------------------------------------ The Earth is not round - it is an oblate spheroid. ---------------------------------------------------------------------------- A (slightly) oblate spheroid seems pretty "round" to me.
Pythagoras stated the earth was round
Yes, it is a fact that the Earth is round.