http://news.nationalgeographic.com/news/2009/08/photogalleries/perseids-meteor-pictures/index.html

The Perseid meteor shower, like all meteor showers, happens when debris from a passing comet gets left behind in that object's orbit around the sun. When Earth passes through the debris, tiny particles get incinerated in our atmosphere.

Rates during the Perseids' peak, which will occur early this afternoon in the United States, may approach a hundred meteors an hour. Normally the Perseids fall at a peak rate of about 70 or 80 an hour.

琴日，我真係傻傻地咁追星，可能屋企睇太光，好耐先見到一粒，訓左陣再睇過又見到一粒，出現既時間好短，只係輕輕咁響天空畫左一下，就唔見左啦!!"雖然無佢地所講咁多粒，但見到都好呀，NG仲話今晚會同琴日一樣咁好，到底仲睇唔睇好呢@V@