Is there a moon in this room? It is in fact a big balloon (气球). British artist Luke Jerram created it. He called it Museum of the Moon. The moon balloon is 7 meters in diameter (直径). Jerram made the balloon according to a picture from NASA. The picture shows the surface (表面) of the moon, Earth’s largest natural satellite (天然卫星). A space camera of NASA took the picture. TEENS