火山毛是指细长如发的火山玻璃。它是流动性强的熔岩成喷泉状喷起且飘浮空中冷凝而成。它一般粗不到半毫米而长度可达1米余，可被风吹到几公里以外。
岩架上覆盖了厚厚的火山灰烬，其间点缀着火山玻璃珠和被称之为火山毛(Pele ' s hair)的熔岩细线。
The ledge was covered with heavy ash, called tephra, and speckled with droplets of volcanic glass and delicate lava threads known as Pele's hair.
这张引人注目的‘月虹'照片是由 Wally Pacholka 在游览参观夏威夷毛伊岛哈雷阿卡拉火山口时拍摄的。
The remarkable photograph of a 'moonbow' was taken by Wally Pacholka as he looked over the Haleakala crater on Maui Island in Hawaii.
蒙着宇宙尘埃的银河拱悬于毛伊岛的哈雷·阿卡拉火山口上空。
Veiled by cosmic dust, the Milky Way arches over Haleakala Crater on Maui.
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