個人資料
弓尒 (熱門博主)
  • 博客訪問:
正文

【Manhattan Henge ~ 曼哈屯落日 ~ Manhattan Solstice】

(2014-07-14 23:21:12) 下一個




Manhattanhenge or Manhattan Henge

又稱 曼哈屯懸日 或 曼哈屯落日

每年兩次 發生在 5月和7月 或 12月和1月(每年的 夏至 和 冬至 前後均分的 大約20~21天)
的日升 或 日落時, 

比如 2014年的夏至 是6月21日
那麽
前數20~21天 是 5月30日; 後數20~21天 是7月21日
(一般是傍晚7~8點左右, 比如 8點28分~~)


夏至看日落, 冬至看日升 最佳景觀, 日落時更壯觀些

其緣由是 太陽橫照 曼哈屯東西走向街道的景觀
此刻 太陽直射 幾乎垂直的 東西方向的街道(胡同兒~)
在兩側高聳的樓房之間狹小的街道上看到整個太陽

短短幾(5~6)分鍾 蔚為奇觀




Satellite view of Manhattan centered on the intersection of Park Avenue and 34th Street,
showing directions and local times of 
sunsets (solid arrows) and sunrises (dotted arrows)
during 
Manhattanhenge (black), 
summer solstice (red),equinoxes (purple),
and 
winter solstice (blue) in 2011.
Times marked 
* have been adjusted for 
daylight saving



去年 抽空去拍, 很難找到理想合適的地點, 拍的不理想

看來 想成點兒事兒 不易 啊, 嗯, 哈 ~:)





















































Manhattanhenge in New York




The Chrysler Building illuminated by Manhattanhenge












這是 從東河 East River 東岸 西拍 曼哈屯 42街 42nd St. (河邊看到的是 聯合國大廈)







Manhattanhenge — sometimes referred to as the Manhattan Solstice —
is an astronomical event during which the 
setting sun is aligned with
the east–west streets of the main street grid for the borough of 
Manhattan, in New York City


This occurs twice a year, on dates evenly spaced around the summer solstice. (sunset)

The first Manhattanhenge occurs around May 28, while the second occurs around July 12. 


According to the Commissioners' Plan of 1811, the main traffic grid for Manhattan
is rotated 29° away from true east-west. Thus, when the 
azimuthfor sunset is 299°
(i.e., 29° North of West), sunset aligns with the streets on that grid. 

A more impressive visual spectacle (and the one commonly advertised as Manhattanhenge)
occurs a couple of days after the first such date of the year, and a couple of days before
the second date, when a pedestrian looking down the centerline of the street towards 
New Jersey can see the full solar disk slightly above the horizon and in between
the profiles of the buildings.
[2]

The precise dates of Manhattanhenge depend on the date of the summer solstice,
which varies from year to year but remains close to June 21. In 2014, the "full sun"
Manhattanhenge occurred on May 30 at 8:18 p.m., and on July 11 at 8:24 p.m.
[1] 


The dates in which 
sunrise aligns with the streets on the Manhattan grid are
approximately December 5 and January 8 – spaced evenly around the 
winter solstice.

wiki

en.wikipedia.org/wiki/Manhattanhenge


上文講了 夏至 和 曼哈吞懸日的關係,  冬至 向東看升日,夏至 向西看落日。



 

















 

曼哈屯 日落 本來沒人太注意或如此稱謂

大約 2002年 有人 鑄了 Manhattanhenge 這個詞, 就火冒起來了

其實 它是 套自 大英帝國 的巨石陣日照 Stonehenge , 如上圖所示

Astrophysicist Neil deGrasse Tyson coined the term Manhattanhenge in 1996 (some said 2002?),
inspired by its likeness to Stonehenge,
where the sun aligns with concentric circles of vertical stones on each of the solstices.


(本文圖片 多是借用,版權歸原作者, 謝謝。)







.




 
[ 打印 ]
閱讀 ()評論 (0)
評論
目前還沒有任何評論
登錄後才可評論.