Quiz

The difference is fundamental. Special relativity (SR) can be briefly explained as "nothing can move faster than the speed of light." And general relativity (GR) is like saying, "Let's take a towel and stretch it. In its normal state, it's flat. If we roll a small ball across the towel, it will roll straight and nothing will happen. But now, let's place a large, heavy ball on the stretched towel. The towel will form a depression from the ball. Now, if we roll the small ball across the towel, it will roll into this depression. This is gravity according to Einstein." But in general... maybe Uranus is right. Two objects, two companions. Why specifically two companions? I think it's not by chance. I believe they are also objects.