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The Islamic Cultural Center was
the first building erected as a mosque in New York City. It contains the
two primary elements that traditionally compose an Islamic house of
worship: a mosque and a minaret. Within the mosque, the mihrab, or alter
niche, faces Mecca, dictating the mosque’s 29 degree angle from the
Manhattan street grid. This alignment creates a traditional exterior court
for worshipers to gather before services. The geometric form of the
mosque, based on a recurring theme of square units, follows Islamic law,
which prohibits the depiction of natural forms since they are made in the
image of God. The result is a striking blend of ancient Islamic tradition
and contemporary design and materials.
One of the most striking
buildings in the City, this mosque is located on the Upper East Side of
Manhattan. The thin crescent Moon is the preeminent symbol of the Islamic
faith and can be seen here atop the dome as well as the minaret.
Ramadan—Islam’s holiest period—is the ninth month of the year, and
its start is signaled by the first sighting of the young crescent Moon
without the aid of a telescope. In the days preceding Ramadan, the Hayden
Planetarium typically receives several hundred phone calls from worshipers
asking for confirmation of the day they should expect to see the crescent
Moon.
Like all mosques, this one was built to
face Mecca, in Saudi Arabia. Easier said than done. If Earth were flat,
all you would need to do is have the building face Mecca straight on. But
Earth's curved surface presents a problem whose full solution requires the
application of a branch of mathematics called spherical trigonometry.
The mosque pictured here is in the middle
of New York City—at 74°45' west longitude and 40°56' north latitude.
Mecca can be found at 39°49' E and 21°27' N. When you do the math,
you'll find that the mosque faces the direction you would travel along
Earth's surface directly above the straight line that connects New York
City to Mecca through the solid Earth. Such a route is more formally
called a geodesic or great circle route and represents the shortest
distance between any two points on a curved surface, or even between any
two points in the curved space of the universe.
With exceptions for the need to fly near
tracking stations and to avoid airspace over unfriendly countries,
commercial airplanes chart their journeys entirely along geodesics, which
accounts for all those odd-looking flight paths over Greenland and
northern Canada for trips that connect the United States and Europe.
Near the center of the Great Mosque in
Mecca is the Ka’bah, the shrine that houses the black stone that is one
of Islam's most sacred relics. By some accounts, the stone may not be of
this Earth but a meteorite from interplanetary space.
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