I've been thinking about this for a while, and finnaly I found a place to talk about the idea.

Could this Dark Energy be, in fact, Gravity?

Example: We are aware that due to the distance from the Sun to the Earth, light takes about 8 minutes to travel. Since gravity can't travel faster than the speed of light, it takes 8 minutes to reach the Earth. So, the gravity we feel from the Sun, is actually the gravity from the Sun-eight-minutes-ago.

That means gravity from the past acts on the present.

If we take that to inter-stellar interaction inside a galaxy, the concept could explain why galaxies have less mass than expected (gravity from the past binding it together). It could even explain the expansion of the universe and why it is accelerated.

I am just an astrophysics enthusiast, have no degree in physics YET, since I'm young (19). Have no idea about the math behind this to test the theory; all I have is the idea. If someone find this theory worthwhile and can do some math, please contact me on e-mail and/or reply with critics.

Thank You.