Which sentence in the passage best states its central idea? excerpt from Astrolympics adapted from NASA The athletes that compete in the Olympics can do amazing things. They run faster, jump higher, and spin quicker than most of us ever will. Many of us are also in awe of what the universe has to offer. Astronomers have explored the heavens with their telescopes and come up with findings that are so fantastic it can be hard to believe they're real. What do Olympic athletes and objects in space have in common? The answer is matter in motion, often in extreme examples. Whether it is a human body moving at the fastest speeds possible or the debris from an exploded star blasting through space, the physics of that motion is, in many ways, the same. When something turns around an axis that doesn't move, we call this rotation. It can often be important—and interesting—to determine just how fast something spins. We call this rotational speed and it is measured as the number of rotations over a certain period of time. In the Olympic Games, athletes often need to rotate in order to compete in their sports. Gymnasts rotate their bodies during routines, ice skaters rotate during their spins, and aerial skiers perform rotations high in the air. How do the spinning accomplishments of these amazing athletes compare to other rotating things that we know about? Reset Submit