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وویجر ، میچشد طعم غوطه ور بودن را . . .
#1
درود بر همه دوستان

"وویجر 1 میتواند تجربه کند حضور در کرانه ی فضای ه میان ستاره ای را "
جمله بالا ترجمه عنوان خبری ست ک سایت دیسکاوری نیوز برای خروج وویجر از منظومه ی شمسی در صفحه ی بخش نجوم خود قرار داده
برای مطالعه بیشتر در مورد وویجر ها ب مطالب همین انجمن مراجعه کنید

[تصویر:  13546524541.jpg]



Voyager 1 Can 'Taste' the Interstellar Shore
As the 35-year-old Voyager 1 probe gets ever closer to becoming
mankind's first interstellar emissary, mission scientists have announced
that the probe has now entered a new and mysterious region of the
heliosphere nicknamed the "magnetic highway."




The heliosphere is the sphere of influence of our sun -- it is
basically a bubble in interstellar space inflated by the sun where all
planets and all spacecraft are contained within
After completing its primary mission of outer solar system
exploration many years ago, Voyager 1 (and its twin probe Voyager 2) has
been ploughing through the outermost reaches of the heliosphere,
rapidly approaching the limit of the solar system -- called the
heliopause.


Although data collected by the aging Voyager 1 have been showing strong signs of flying beyond
the heliopause, mission scientists at the AGU conference in San
Francisco announced on Monday that hopes of an interstellar Voyager 1
are premature.


However, the mission is beginning to "taste" the interstellar shores.




It appears that the probe has flown into a new and unexpected region
of the heliosphere where the rush of particles generated by the sun --
that, in turn, form the solar wind -- are carried by the weakening solar
magnetic field, pushing against the interstellar medium. The outside
(interstellar medium) pressure sweeps back the sun's magnetic field,
channeling solar particles into a high-speed "magnetic highway." But
high-energy particles from outside the heliopause are leaking into the
highway and washing over the spacecraft's instruments.


ANALYSIS: Voyager 1 About to Become Interstellar Emissary?


"Although Voyager 1 still is inside the sun's environment, we now can
taste what it's like on the outside because the particles are zipping
in and out on this magnetic highway," Edward Stone, Voyager project
scientist based at Caltech in Pasadena said in a NASA press release.
"We believe this is the last leg of our journey to interstellar space.
Our best guess is it's likely just a few months to a couple years away.
The new region isn't what we expected, but we've come to expect the
unexpected from Voyager."


Voyager 1 has been experiencing the outermost regions of the solar
system for several years, hitting the solar system's "termination shock"
in 2004. It then blasted into the "helioshieth", a region where the
solar wind slowed rapidly and succumbed to turbulence. Most recently,
Voyager 1 detected the solar wind particles slow to zero signifying that
the probe must be approaching the outermost boundary before
interstellar space. At the same time, a strengthening of the magnetic
field was detected.




Most recently, a rapid drop in lower-energy particles (originating
from the sun) coincided with a noticeable increase in high-energy
particles (originating from interstellar space) leading many to
speculate that Voyager 1 had officially left the solar system's
heliopause. However, NASA scientists aren't yet ready to call Voyager 1
an "interstellar mission."


NEWS: Voyager: Solar System Edge is Bubbly and 'Frothy'


"If we were judging by the charged particle data alone, I would have
thought we were outside the heliosphere," said Stamatios Krimigis,
principal investigator of the low-energy charged particle instrument,
based at the Johns Hopkins Applied Physics Laboratory, Laurel, Md. "But
we need to look at what all the instruments are telling us and only time
will tell whether our interpretations about this frontier are correct."


"We are in a magnetic region unlike any we've been in before -- about
10 times more intense than before the termination shock -- but the
magnetic field data show no indication we're in interstellar space,"
said Leonard Burlaga, a scientist on the Voyager magnetometer team at
NASA's Goddard Space Flight Center in Greenbelt, Md. "The magnetic field
data turned out to be the key to pinpointing when we crossed the
termination shock. And we expect these data will tell us when we first
reach interstellar space
[تصویر:  13546547281.jpg]
mages: Top: Voyager 1 enters the "magnetic highway." Bottom: The components of the outer heliosphere. Credit: NASA/JPL-Caltech

در مورد اظهار نظر آقایون در تاپیک دلخوری باید بگم:
آقایون: کم گوی و گزیده گوی چون در// تا ز اندک تو جهان شود پر!!!
هرچند ک کلام گوهر بار از زبان شما جاری نشده، نمیشود و نخواهد شد!!!
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  خداحافظ وویجر !!! amir astronomer 3 277 29-08-2012، 01:41 AM
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