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Difference between perseid, meteor,meteoroid,meteorite
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What
is Asteriod?
Asteroids
are celestial bodies which revolve around the Sun.
They are
not big enough to qualify as a Planet.
They are
mainly composed of rocks and metals.
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Then What
is Meteoroid?
If
diameter of of the asteroid is
50
meter
or less, then it is called as Meteoroid.
(The
Royal Astronomical Society says " If the diameter
of the asteroid is 10 meter
or less, then it is a meteoroid.)
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Then
What is Meteor?
If
the Meteoriod produces Light, then the light is called
as Meteors.( When an object enters into earth, there
will be friction. Because of friction,enormous heat
is generated. Because of heat, the object gets burnt
and a streak of light is produced).
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Then
What is Meteorite?
The
remains of the meteoroid which landed safely on the
earch surface is METEORITE.
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Then
What is PERSEID?
If
the parent of meteor is the rocky debris of Swift-Tuttle
Comet, then the meteor is called as Perseid.
When the swift-tuttle comet moves along,
it leaves behind a debris. This stream of debris is
called the Perseid cloud and stretches along the orbit
of the comet Swift-Tuttle. (By the way, the swift-tuttle
comet was discovered by Mr.Swift and Mr.Tuttle).
The cloud consists of particles ejected
by the comet as it travels on its 130-year orbit.(Yes,
this comet takes about 130 years for one revolution
around the sun.). Most of the dust in the cloud today
is around a thousand years old.
When the earth revolves around the sun,
the earth comes near this perseid cloud durig the month
of August and some of the debris is sucked by the earth.
This forms the meteor shower. This shower is called
as perseid meteor shower.
The location of this shower is in the
Perseus constellation and hence this shower got the
name "perseids".
Esssence:
Tthe parent body of the Perseid meteor shower is swift-tuttle.
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Remember the following points:
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- The
Perseids is the name of a prolific meteor shower associated with the
comet Swift-Tuttle.
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- The
Perseids are so-called because the point they appear to come from, called
the radiant, lies in the constellation Perseus.
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This perseid cloud stretches along the orbit of the Comet Swift-Tuttle.
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This cloud consists of particles ejected by the comet as it passes by
the Sun.
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- Most
of the dust in the cloud today is approximately a thousand years old.
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However, there is also a relatively young filament of dust in the stream
that was pulled off the comet in 1862.
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- The
rate of meteors originating from this filament is much higher than for
the older part of the stream.
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- The
Perseid meteor shower has been observed for about 2000 years.
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- The
shower is visible from mid-July each year, with the greatest activity
between August 8 and 14, peaking about August 12.
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- During
the peak, the rate of meteors reaches 60 or more per hour.
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They can be seen all across the sky, but because of the path of Swift-Tuttle's
orbit, Perseids are primarily visible in the northern hemisphere.
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- If
there is moon light, fainter perseids will not be visible.
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astronomy, nasa,meteors, meteorite,perseid
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