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Perseid meteor showers
also
see -> Leonids
meteor showers | Orionid
meteor showers
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What:
an annual celestial light show of "falling
stars" or meteors.
When: This year, peak viewing occurs on August
11-12, 2009 beginning at 9:30 PM, growing more spectacular
in the early morning hours until dawn.
Where: look toward the horizon at the constellation
Perseus rising in the northeast sky.
What to bring: lawn chair, bottled water,
camera, tripod, and maybe a small telescope for
extreme up-close views.
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The Perseid meteor
shower is an annual meteor shower that is extremely regular in its
timing and can potentially be visible for weeks in the late summer
sky, depending on weather and location.
The Perseid
meteor shower is named after the constellation Perseus, which
is located in roughly the same point of the night sky where the
Perseid meteor shower appears to originate from. This is a useful
naming convention, but not very accurate!
The source of the Perseid meteor shower is actually debris from
the comet Swift-Tuttle. Every year, the earth passes through the
debris cloud left by the comet when the earth's atmosphere is
bombarded by what is popularly known as "falling stars."
When and
where to look for Perseids
Because of the way the earth hits this debris cloud, the Perseid
meteor shower is much more visible in the Northern hemisphere.
People in
Canada, for instance, can see the meteor shower by mid-July, but
generally there isn't much activity at such an early date. Throughout
Europe, the US and the rest of North America, meteor shower activity
usually peaks sometime around August 12th, when it is not unusual
to see at least 60 meteors per hour streaking across the Northeast
sky.
The meteors are certainly bright, but they are actually only tiny
objects, usually no more than a grain of sand. They travel at
speeds of 71 kilometers per second, however, which helps these
small particles put on such a brilliant show year after year.
The Perseid
meteor showers were observed as far back as two thousand years
ago, and in ancient Europe, the Perseid meteor shower was known
as the "Tears of St. Lawrence."
How to
view Perseids
Today, the best place to observe the Perseid meteor shower (or
any meteor shower for that matter), is somewhere dark, away from
light pollution, and with the moon out of the field of vision.
The less light visible, the more brilliant the meteor shower will
be.
Telescope or camera?
While mostly
viewable to the naked eye, the annual Perseid meteor show may
be partially obstructed by the moon, clouds or night mist, so
amateur astronomers may want to carry along a pair of binoculars
or a small telescope and tripod just in case. Even on clear nights,
a telescope may come in handy for catching sight of even the faintest
of falling stars, aptly named "telescopic" meteors.
On super clear nights, forget the telescope and simply look up
toward the northeast sky.
For photographing
the annual event, a digital camera mounted on a tripod helps to
steady the images that swiftly move across the sky. A quick trigger
finger also helps, but even random clicks during the height of
Perseid "prime-time" will also guarantee that you'll
catch something! Be sure to have the camera focused on infinity
and, if your camera permits, leave the shutter open for several
minutes for the most spectacular photographic effects.
More about
Perseid meteor showers around the Web:
2009
Meteor Showers & Viewing Tips - The full year's schedule
with peak dates and best viewing times in the U.S.
2008
Perseid meteor shower photos
- More than a dozen visitor submitted photos from the US, UK and
Europe.
How
to View the Perseid Meteor Showers - Step-by-step guide
from eHow.com with advice on where, when and how to view the annual
meteor display, with visitor comments and related resources.
Meteors:
A Primer - Brief but informative overview of common terms
that help identify various sizes and types of meteors.
also
see in Science --> Astronomy
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