Originally Posted by **Dylss** If space curves, so will spacetime. Because of they rely on each other. |

Curved spacetime isn't curved space. Look at the bottom of

this Baez article:

*"Similarly, in general relativity gravity is not really a 'force', but just a manifestation of the curvature of spacetime. Note: not the curvature of space, but of **spacetime*. The distinction is crucial".
Perhaps I can explain this distinction via an analogy. Imagine you're standing on a headland, looking out over the sea. It's flat calm, glassy like a mirror. On your left is an estuary, on your right is the open ocean. So there's a salinity gradient from right to left. After a while you notice something out to sea, coming towards you. You realise that it's a wave, just one, all on its own. You plot its course, and you come to appreciate that its path is slightly curved. It's curving slightly towards the right because of the salinity gradient. This wave is standing in for a photon. Its path is curved because the water density isn't uniform. The water is standing in for space. The path of the wave

*through* space

*over* time is curved, so we say spacetime is curved. Now look back to that wave moving across the ocean. Look closely at the surface of the sea where that wave is. It's curved.

Originally Posted by **Dylss** But i'm still not completely clear about this isn't true. Try seeing it from the other side. If dark energy wouldn't exist, gravity would be a bigger influence? Maybe the answer of this question makes it easier for me to understand the fundementals of expanding space. |

I can't give you an authoritative answer on this, just a personal take: see the

stress-energy tensor on Wikipedia? Look at the picture on the right. See the energy-pressure diagonal? Think of a gravitational field as a "pressure gradient in space". Now look at

dark energy and note the reference to "negative pressure". Negative pressure is tension. Like in the skin of a balloon. See the

balloon analogy used in cosmology to represent the expanding universe. A balloon is the size it is because the pressure inside is balanced by the tension in its skin. And there are two ways to make that balloon bigger. You can increase the pressure or you can reduce the tension. Think bubblegum. If the skin gets thinner it expands, so the skin gets thinner so it expands some more and so on. Space of course is three dimensional, so the balloon analogy only takes you so far, and nobody knows the answer for sure. For myself I play around with stress balls and silly putty and plumbers' expanding foam to try to get an understanding of what might be going on. I'd say ask around and get as much input on this as you can.