A law of things

Can you please let me know if "law things" is law of bodies in space?

At 0:47 video

But he explained the moon going around the earth, and the earth going around the sun, and he would later explain Jupiter's moons going around Jupiter. So, it wasn't just a law of things that went around the sun, it appeared to be kind of universal, in the literal use of that term, as opposed to how that word is used so often in our culture: Miss universe, she's "miss earth", please! All right? Okay?