Apparently the universe is expanding at an ever increasing greater rate. What is causing this acceleration in the universe causing stars and galaxies furtherest out to move faster away from the center.  In this lecture many related topics are considered such as: dark energy, dark matter, Einsteins theory of relativity, and the energy in the vacuum of space. Apparently empty space is not empty, but full of energy. Well, great video, but leaves me with more questions than answers. Could gravity have a finite limit ? Could electromagnetic radiation have a limit???

The Dark Energy Delusion | Claudia de Rham Public Lecture