And this is how it works. Gravity is more powerful where there's more stuff. 这就是它怎么运作的。重力场的作用力更大，拥有比较多的物质。 So where you get slightly denser areas, gravity starts compacting clouds of hydrogen and heli
OF WHAT USE is a college training? We who have had it seldom hear the question raised might be a little nonplussed to answer it offhand. A certain amount of meditation has brought me to this as the pi
