We can show this with our old friend the spacetime diagram. Let’s have just two dimensions of space and so we have space … for time. We show progression through time as the object moves up.

Here is a diagram of the forces on this object. The center of mass is in the middle of the two masses since they are identical. For gravity though, it's different.

And it accounted for why light bends near massive objects (it does pretty much the same thing the alien tennis ball does in the diagram above). Newtonian gravity only applied to objects with mass ...

Some theories suggest there could be many more dimensions that we’re unaware of, mostly because they’re imperceptibly tiny. Now researchers have taken the search for extra dimensions down to ...

Gravity is the force that keeps us grounded. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Gravity is one of the universe's fundamental ...

The idea of gravity as we know it has been around for a long time. More than 300 years ago, Isaac Newton first shared his theory of gravitation, describing how massive objects are attracted to ...