泰德天文台上空的英仙座流星，加那利群岛，西班牙 Perseid meteors over Teide Observatory, Tenerife, Spain (© Westend61/Getty Images)

泰德天文台上空的英仙座流星，加那利群岛，西班牙 Perseid meteors over Teide Observatory, Tenerife, Spain (© Westend61/Getty Images)

许个愿吧 Make a wish

西班牙特内里费上空的英仙座流星雨

并非所有夏日传统都发生在地面。有些在数百英里高空上演，每次划过一颗流星。英仙座流星雨每年从7月中旬持续至8月下旬，并在8月12日至13日前后达到峰值。世界大部分地区都能看到它；在黑暗天空下，每小时往往会出现数十颗流星。想象自己抬头仰望，一道接一道亮光划过。数到多少颗时，你会忘记数目？每道亮光都来自斯威夫特-塔特尔彗星散落的碎屑，地球穿过其尘埃带时便形成流星。它们看起来像是从英仙座辐射而出。

今天的图片展示了流星雨掠过西班牙特内里费泰德天文台上空的景象。这处高海拔观测点坐落在约7,840英尺高处。海拔高、空气稀薄且光污染程度低，使这里成为观测夜空的绝佳地点。有些英仙座流星会留下持续数秒的发光尾迹，让观星者有足够时间欣赏这场奇观。那么，今年你准备去哪里观看英仙座流星雨？

Perseid meteor shower over Tenerife, Spain

Not every summer tradition happens on the ground. Some take place hundreds of miles overhead, one meteor at a time. The Perseids return every year from mid-July through late August, reaching their peak around August 12-13. Visible across much of the world, they often produce dozens of meteors per hour under dark skies. Picture yourself looking up. One streak appears after another. How many can you spot before you lose count? Each streak comes from debris shed by Comet Swift-Tuttle as Earth moves through its dust trail. The meteors appear to radiate from the constellation Perseus.

Today's image shows the shower above Teide Observatory in Tenerife, Spain. This high-altitude site sits about 7,840 feet above sea level. Its high elevation, thin air, and low levels of light pollution make it an excellent place to observe the night sky. Some Perseid meteors leave glowing trails that linger for several seconds, giving skywatchers just enough time to appreciate the spectacle. So, where will you watch the Perseids this year?