维利亚里卡火山与星空

Villarrica Volcano Against the Sky
Video Credit & Copyright: Gabriel Muñoz; Text: Natalia Lewandowska (SUNY Oswego)

Explanation: When Vulcan, the Roman god of fire, swings his blacksmith’s hammer, the sky is lit on fire. A recent eruption of Chile‘s Villarrica volcano shows the delicate interplay between this fire — actually glowing steam and ash from melted rock — and the light from distant stars in our Milky Way galaxy and the Magellanic Clouds galaxies. In the featured timelapse video, the Earth rotates under the stars as Villarrica erupts. With about 1350 volcanoes, our planet Earth rivals Jupiter’s moon Io as the most geologically active place in the Solar System. While both have magnificent beauty, the reasons for the existence of volcanoes on both worlds are different. Earth’s volcanoes typically occur between slowly shifting outer shell plates, while Io‘s volcanoes are caused by gravitational flexing resulting from Jupiter‘s tidal gravitational pull.

Tomorrow’s picture: open space

维利亚里卡火山与星空
影片提供与版权: Gabriel Muñoz; Text: Natalia Lewandowska (SUNY Oswego)

说明: 在罗马神话里，当火神弗尔肯挥动他的铁匠锤时，天空就会起火燃烧。智利的维利亚里卡火山最近一轮的喷发，就生动展示了这种火光（其实是熔岩的明亮蒸汽与火山灰）和我们银河系、大及小麦哲伦星系的星光之间的美妙互动。此外，于这部缩时主题影片里，在维利亚里卡火山喷发的同时，地球也在星空下自转。拥有约1350座火山的地球，与木星的木卫一同为太阳系中地质活动最活跃的天体。虽然这二个天体都拥有壮丽的火山景观，但火山存在的原因不同。地球的火山通常出现在缓慢移动的表层板块之间，而木卫一上的火山，则是因为木星潮汐引力的搓揉所致。（Vulcan 火神、弗尔肯；Villarrica volcano 维利亚里卡火山）

明日的图片: open space

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