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

弓尒 · 2014-07-12 12:35:19Z

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

来源: 弓尒于 2014-07-12 12:35:19 [档案] [博客] [旧帖] [给我悄悄话] 本文已被阅读：次 (19843 bytes)

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Manhattanhenge or Manhattan Henge

又称曼哈屯悬日或曼哈屯落日

每年两次发生在 5月和7月或 12月和1月（每年的夏至和冬至前后均分的大约20～21天）
的日升或日落时，

比如 2014年的夏至是6月21日
那么
前数20～21天是 5月30日；后数20～21天是7月21日
（一般是傍晚7～8点左右，比如 8点28分～～）

夏至看日落，冬至看日升最佳景观，日落时更壮观些

其缘由是太阳横照曼哈屯东西走向街道的景观
此刻太阳直射几乎垂直的东西方向的街道（胡同儿～）
在两侧高耸的楼房之间狭小的街道上看到整个太阳

短短几（5～6）分钟蔚为奇观

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，很难找到理想合适的地点，拍的不理想

看来想成点儿事儿不易啊，嗯，哈～：）

The Chrysler Building illuminated by Manhattanhenge

这是从东河 East River 东岸西拍曼哈屯 42街 42nd St. (河边看到的是联合国大厦)

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

上文讲了夏至和曼哈吞悬日的关系，冬至向东看升日，夏至向西看落日。

曼哈屯日落本来没人太注意或如此称谓

大约 2002年有人铸了 Manhattanhenge 这个词，就火冒起来了

其实它是套自大英帝国的巨石阵日照 Stonehenge , 如上图所示

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.

（本文图片多是借用，版权归原作者，谢谢。）