New answers tagged

6

Quick answer for now; the Earth's field has been more and more carefully measured by precise tracking of satellites over time. It stared with very careful visual tracking/timing and interferometrically tracking and recording the Doppler shift of the radio signals from late 1950's satellites like Sputnik and Vanguard and then many many others over the years, ...


-2

How about thinking of it as pressure. If you imagine space as a big tank of water in zero gravity. Normally bubbles float up but in a zero gravity environment the idea of floating up gose out the window. The bubble would instead flow to the lower density areas rather then higher density areas. So if you can think of matter displacing space and creating a ...


0

I'm not sure how much this will add, but the points are exactly that - just points. Gravitational bodies are often reduced to points for the purpose of calculations, such as, centers of mass and barycenters are also points. The Lagrange points are the same - mathematically calculated points based on the two objects in orbit around their mutual barycenter....


3

From this source I get: The size of these islands varies. Each planet in the solar system has its own Lagrangian points. The islands of stability get bigger farther from the Sun and also for more massive planets. The ones associated with Earth are roughly 500,000 miles (800,000 kilometers) wide. The biggest zones (at least in the solar system) ...


0

I guess the point is that there are two ways to calculate how big a crater a given impact will create. One is based on calculating how much rock the impact energy can shatter so the main constraint is the strength of the rock) the other on calculating how much it can lift (so the main constraint is the weight of the rock). For small impacts the first is the ...


Top 50 recent answers are included