This picture is about gravity and General Relativity. Gravity can be seen as a force (Newtonian gravity) or a geometry or curvature in spacetime (Einsteinian gravity).
Newton thought that space and time were separated and fixed, whilst Einstein thought space and time form a continuum, the spacetime continuum, and that it is flexible. The following picture shows this difference pretty well with the approximation of a net.
But what are the consequencies?
Every planet, or even every particle leaves distortions in the net as Einstein viewed it. The more massive the object the bigger the distortion, and the denser the object the "deeper" the distortion. Not just space gets distorted in the presence of massive objects, also time.
In the picture you can see the ghost holding a melting clock above a spacetime distortion. The melting clock is a symbol for distorted time.
The thing from where the ghost comes is a wormhole or Einstein-Rosen bridge.
The ghost itself is a symbol for a special figure-background relationship.
© Dywiann Xyara 2018