Last night, the sky was cloudy. We couldn't see much. Then, the clouds passed and the night sky became visible. The Perseid meteor showers began to appear. The comet Swift-Tuttle only comes every 133 years. However, the meteor shower occurs every year when Earth moves through the trail of its orbit. Its dust and debris burn up in Earth's atmosphere. These burning bits are meteors, "fireballs". They are also called "shooting stars". The Perseid meteor shower is an awesome sight.
The main idea of the text above is?