Myquestion is: Is every bit of matter in the universe affected by all of the matter? Is every galaxy, no matter how far away affected by all of the other galaxies?
Can a star exist in the universe without being part of a galaxy?

All matter in the universe is affected by all matter in the universe regardless of distance. Have a read of http://en.wikipedia.org/wiki/GravityMyquestion is: Is every bit of matter in the universe affected by all of the matter? Is every galaxy, no matter how far away affected by all of the other galaxies?
Yes, it's possible. Recently astronomers detected a star being shot out of our own galaxy. The article: http://www.universetoday.com/am/publish ... tml?822005Can a star exist in the universe without being part of a galaxy?