Exploring Gravity: Understanding the Dips in Space on NASA's Space Place Website

[A.T.]

Will you say this video is a pretty well explanation of geodesics as you previously explained?

Check out the this link for a clearer explanation of how those geodesics relate to gravity:

http://www.relativitet.se/spacetime1.html

 

[David Lewis]

For the 2d images, perhaps they can tell us it's a shorthand, but then show us an actual 3d image and explain how "Riemann geometry" works.

The 3D model could incorporate time as one of the dimensions. Unlike space, you are unavoidably moving through time no matter what. Also, a spacetime interval is the same in all reference frames.

 

[Dale]

Closed pending moderation

Edit: some speculative posts have been deleted and the thread is closed.