Question about universe
Well, my question starts off with a question, one from my 5 year old brother - why are stars circles? Well, I told him a simple answer - he knew the sun was a star, so I said that since the sun is a circle, so was the stars. But then that got me thinking - why are stars spheres? I knew that one too - matter tends to clump into spheres because it is the nature of gravity: it pulls equally in all directions from a given point, and an almost of equal ammount of matter tries to converge at this point. This is how everything works in space, I told myself. But then I realized it didn't - our solar system, I was led to believe, was flat - everything rotated the same direction, and on the same plane. The same thing with our galaxy - it isn't spherical either. So my question is why. Why does our solar system and galaxy not appear to be spherical?
And on a side note, I went to a childrens museum the other day, and they had this little side exhibet about the history of time - one fact was the discovery of antimatter - "matter that travels backwars in time." Is that, in fact, true?
I hope that when the world comes to an end I can breathe a sigh of relief, because there will be so much to look forward to.