Copyright:
Yuichi Takasaka /
TWAN /
www.blue-moon.ca
原文:
Recorded in 2014 April, this total lunar eclipse sequence looks south down icy Waterton Lake from the Waterton Lakes National Park in Alberta, Canada, planet Earth. The most distant horizon includes peaks in Glacier National Park, USA. An exposure every 10 minutes captured the Moon’s position and eclipse phase, as it arced, left to right, above the rugged skyline and Waterton town lights. In fact, the sequence effectively measures the roughly 80 minute duration of the total phase of the eclipse. Around 270 BC, the Greek astronomer Aristarchus also measured the duration of lunar eclipses – though probably without the benefit of digital clocks and cameras. Still, using geometry, he devised a simple and impressively accurate way to calculate the Moon’s distance, in terms of the radius of planet Earth, from the eclipse duration. This modern eclipse sequence also tracks the successive positions of Mars, above and right of the Moon, bright star Spica next to the reddened lunar disk, and Saturn to the left and below. Gallery: Last night’s total supermoon eclipse
中文翻譯:
🌕 2014年4月錄製的這個月全食序列，從加拿大阿爾伯塔省的瓦特頓湖國家公園向南拍攝。最遠的地平線包括了美國的冰川國家公園的山峰。每10分鐘拍攝一次的曝光捕捉了月亮的位置和食相，隨著它在崎嶇的天際線上從左到右拱起，以及瓦特頓小鎮的燈光。事實上，該序列有效地測量了月全食大約80分鐘的總時間。大約公元前270年，希臘天文學家亞里士塔克斯也測量了月食的時間——雖然他可能沒有數位時鐘和相機的幫助。儘管如此，他利用幾何學推導出了一種簡單而令人印象深刻的精確方法，根據月食的持續時間來計算月亮距離地球半徑的距離。這個現代的食序列同時追蹤了火星的位置，位於月亮的右上方，亮星天秤座旁邊緊挨著被染紅的月盤，土星則在月亮的左側和下方。
#月全食 #瓦特頓湖國家公園 #冰川國家公園 #天文 #天文學 #星空 #月亮 #火星 #土星 #天秤座 #宇宙奇觀
來源:NASA每日圖片
