Topic: “Sphericity”

The Sphere of Earth as Seen from Space

The title Whole Earth Catalog came from a previous project by Stewart Brand. In 1966, he initiated a public campaign to have NASA release the then-rumored satellite photo of the sphere of Earth as seen from space, one of the...

It Is Probably a Sphere

Before any celestial distances or sizes could be calculated, the ancient Greeks first had to establish that the Earth is a sphere. This view gained acceptance in ancient Greece as philosophers became familiar with the notion that ships gradually disappear...

Source: Big Bang  by Simon Singh

Earth Had to Be a Sphere

It is not so much that certain educated men had not already theorized that Earth was round, but that with the return of the first ship Victoria the expedition’s wealthy financial backers had visual evidence that ships could circumnavigate the...

Source: JFK  by L. Fletcher Prouty

All of a Sudden, Proved to Be a Sphere

The first of these schemes derives from the fact that the generally accepted "flat earth" was, all of a sudden, proved to be a sphere by the voyage of Magellan's ships around the world.

Source: JFK  by L. Fletcher Prouty

Somehow Glued to It by Gravity

While almost everyone is taught that the Earth is a sphere with all of us somehow glued to it by gravity, the reality of our circumstance did not really begin to sink in until the famous frame-filling Apollo photograph of...

Source: Pale Blue Dot  by Carl Sagan