Hovenweep国家纪念碑的方塔，犹他州 Square Tower Group in Hovenweep National Monument, Utah (© Brad McGinley Photography/Getty Images)

Hovenweep国家纪念碑的方塔，犹他州 Square Tower Group in Hovenweep National Monument, Utah (© Brad McGinley Photography/Getty Images)

A timeless view of the night sky

The bright sweep of the Milky Way is especially vivid amid the mesas, canyons, and prehistoric towers of Hovenweep National Monument. Straddling the southern Colorado-Utah border, Hovenweep is so remote that almost no artificial light disturbs the view of star-filled skies. The dazzling nightscapes are little different from those seen by the Ancestral Puebloans who built these towers. They were a farming culture who first settled in the area roughly 1,100 years ago. By the late 1200s they numbered around 2,500 people and had built these and other structures in six different villages. Archaeologists offer several theories to explain the use of the buildings. Some may have been defensive fortifications, storage areas, homes, or any combination of these. But researchers suggest that the tower called Hovenweep Castle, seen here, was almost certainly used as a celestial observatory.

That's why we're visiting Hovenweep during International Dark Sky Week, which lasts through the weekend. Organizers of the event, held during the week of the new moon in April, encourage us to observe the beauty of the night sky without light pollution. It's easy to do here—in 2014, the International Dark Sky Association named Hovenweep a Dark Sky Park, offering protections that preserve the extraordinarily pristine skies that once shone down on the Ancestral Puebloans.

永恒的夜空

在霍文韦普国家纪念碑的台地、峡谷和史前塔楼中，银河系的明亮一扫显得尤为生动。横跨科罗拉多州和犹他州的南部边界，霍文韦普非常偏远，几乎没有人造光干扰满天星空的景象。令人眼花缭乱的夜景与建造这些塔的普埃布劳恩斯祖先所看到的几乎没有什么不同。他们是一种农业文化，大约1100年前第一次在这个地区定居。到12世纪末，他们大约有2500人，在六个不同的村庄建造了这些和其他建筑。考古学家提供了几种理论来解释这些建筑的用途。有些可能是防御工事、储存区、住宅，或这些的任何组合。但研究人员认为，在这里看到的这座名为霍文韦普城堡的塔几乎肯定是用作天文观测站的。

这就是为什么我们要在国际黑暗天空周期间参观霍文韦普，这一周将持续到整个周末。这项活动的组织者在四月的新月周举行，鼓励我们在没有光污染的情况下观察美丽的夜空。2014年，在这里很容易做到，国际黑暗天空协会将霍文韦普命名为一个黑暗天空公园，提供保护，保护曾经照耀在普韦布洛祖先身上的异常原始的天空。