IN a paper entitled "The Story of Newton's Inverse Square Law and his Use of a False Radius of the Earth" (J. Brit. Astro. Assoc., 50, 2; 1939), John Miller states that the story of Newton's ...

However, we have shown in this study that the low-velocity region is only near the Equator. Earth's outer core has a radius of around 3,480 km, which makes it slightly bigger than the planet Mars.

Imagine a piece of string wrapped around the Earth's equator - that's about 40,000km ... of a circle is directly proportional to the radius. Double the radius, double the circumference.

The idea of geosynchronous satellites is to find an orbit over the equator in which the satellite ... We know all the other variables: G, mass of earth, and the period. Thus we only have to solve for ...

Electromagnetic chorus waves once thought to only exist close to the Earth have been found at a distance of 165,000 kilometers (102,526 miles) from us. Although that is still less than half the way to ...