Aug 29, 2025 · How do we know Earth isn't flat? We can prove it. Here are 5 scientific ways of deducing that our home planet is a round globe, not a disc.

Jun 4, 2025 · We know the Earth is round because of a confluence of evidence, from ancient observations to modern satellite imagery. These observations, which predate and supersede …

Mar 11, 2025 · They made the first orbit of Earth by sea, and they knew the Earth was round, allowing them to go across one ocean and come back home the other way. If the Earth were …

This shape is caused by the sheer speed of Earth’s rotation, which makes our planet about 70,000 feet wider at the Equator than at the poles. The Moon’s gravitational pull on the tides …

Mar 9, 2025 · Earth’s rotation explains why Earth isn’t a perfect sphere. The rotational force creates a slight bulging at the equator, forming the oblate spheroid shape.

Jan 16, 2025 · Explore the science behind Earth's shape. Learn why our planet is a sphere (or almost!) and the forces that shaped it, from gravity to rotation.

Mar 10, 2009 · And that's why the Earth is round. Of course, the Earth isn't perfectly round. Because it's turning on its axis approximately once every 24 hours, the Earth's equator bulges …

Nov 16, 2023 · Satellite images and measurements of Earth's gravitational field show us that the Earth is not a perfect sphere. Instead, it is an oblate spheroid shape. An oblate spheroid is a …

Gravity is the primary force that gives the Earth its round shape. When the Earth first formed around 4.5 billion years ago, it was a molten mass of hot, liquid rock and gas. Gravity pulls …

Students will learn: • Why Earth looks round from space • How gravity causes Earth to bulge at the equator • What the term geoid really means • How ancient and modern scientists proved ...