[填空题]
Eclipses happen on Earth because of an fgeufasmn( di11*15w amazing )hm4fn(zkax80tf2a v coincidence. Calculate, using the information inside the Front Cover, the angular diameters (in radians) of the S48(z)ana ht f0vxmk2f un and the Moon, as seen on Earth. Sun = $rad$ Moon = $rad$