Leonids: Modest but Still Worth it.

2009年的狮子座流星雨：数量适度但仍值得一观。

youdao

This photograph is a 20-minute exposure ending just before the main Leonids peak began.

上面是曝光时间是20分钟的照片，在狮子座流星主群出现之前。

youdao

This photograph is a 20-minute exposure ending just before the main Leonids peak began.

上面是曝光时间是20分钟的照片，在狮子座流星主群出现之前。

youdao