Saat Voyager 1 mengarungi alam raya, Abbas Amin, arra_s, ayub yahya, Ballast
Yo, Dimas Wuryanto, johny-indon, Dipo, PAREWA PAREWA, rezameutia, Roman
Proteus, safin _blanc, Tawang dll. yang dungu-dungu kayak anjing itu masih
bersedia melahap bualan orang Arab primitif penyusun khurafah najis al-Mushaf
yang bilang allah takhayul itu menciptakan bumi kyalahan yang terdiri dari
tujuh lapis, langit khayalan yang juga terdiri dari tujuh lapis dan yang
dilapisan paling rendah dihiasi oleh bintang-bintang khayalan yang dipakai
malaekat khayalan buat nyambit setan khayalan...,
Harga diri, itulah yang tidak dimiliki manusia dungu-dungu kayak anjing itu.
--
Web address:
http://www.sciencedaily.com/releases/2012/12/
121203154500.htm
NASA Voyager 1 Encounters New Region in Deep Space
enlarge
Voyager 1 Explores the 'Magnetic Highway': This still image shows NASA's
Voyager 1 spacecraft exploring a new region in our solar system called the
"magnetic highway." In this region, the sun's magnetic field lines are
connected to interstellar magnetic field lines, allowing particles from inside
the heliosphere to zip away and particles from interstellar space to zoom in.
(Credit: NASA/JPL-Caltech)
ScienceDaily (Dec. 3, 2012) NASA's Voyager 1 spacecraft has entered a new
region at the far reaches of our solar system that scientists feel is the final
area the spacecraft has to cross before reaching interstellar space.
Scientists refer to this new region as a magnetic highway for charged particles
because our sun's magnetic field lines are connected to interstellar magnetic
field lines. This connection allows lower-energy charged particles that
originate from inside our heliosphere -- or the bubble of charged particles the
sun blows around itself -- to zoom out and allows higher-energy particles from
outside to stream in. Before entering this region, the charged particles
bounced around in all directions, as if trapped on local roads inside the
heliosphere.
The Voyager team infers this region is still inside our solar bubble because
the direction of the magnetic field lines has not changed. The direction of
these magnetic field lines is predicted to change when Voyager breaks through
to interstellar space. The new results were described at the American
Geophysical Union meeting in San Francisco on Monday.
"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," said Edward Stone, Voyager project scientist based at
the California Institute of Technology, Pasadena. "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."
Since December 2004, when Voyager 1 crossed a point in space called the
termination shock, the spacecraft has been exploring the heliosphere's outer
layer, called the heliosheath. In this region, the stream of charged particles
from the sun, known as the solar wind, abruptly slowed down from supersonic
speeds and became turbulent. Voyager 1's environment was consistent for about
five and a half years. The spacecraft then detected that the outward speed of
the solar wind slowed to zero.
The intensity of the magnetic field also began to increase at that time.
Voyager data from two onboard instruments that measure charged particles showed
the spacecraft first entered this magnetic highway region on July 28, 2012. The
region ebbed away and flowed toward Voyager 1 several times. The spacecraft
entered the region again Aug. 25 and the environment has been stable since.
"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."
Spacecraft data revealed the magnetic field became stronger each time Voyager
entered the highway region; however, the direction of the magnetic field lines
did not change.
"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
Voyager magnetometer team member based 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."
Voyager 1 and 2 were launched 16 days apart in 1977. At least one of the
spacecraft has visited Jupiter, Saturn, Uranus and Neptune. Voyager 1 is the
most distant human-made object, about 11 billion miles (18 billion kilometers)
away from the sun. The signal from Voyager 1 takes approximately 17 hours to
travel to Earth. Voyager 2, the longest continuously operated spacecraft, is
about 9 billion miles (15 billion kilometers) away from our sun. While Voyager
2 has seen changes similar to those seen by Voyager 1, the changes are much
more gradual. Scientists do not think Voyager 2 has reached the magnetic
highway.
The Voyager spacecraft were built and continue to be operated by NASA's Jet
Propulsion Laboratory, in Pasadena, Calif. Caltech manages JPL for NASA. The
Voyager missions are a part of NASA's Heliophysics System Observatory,
sponsored by the Heliophysics Division of the Science Mission Directorate at
NASA Headquarters in Washington.
For more information about the Voyager spacecraft, visit:
http://www.nasa.gov/voyager and http://voyager.jpl.nasa.gov .
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Story Source:
The above story is reprinted from materials provided by NASA/Jet Propulsion
Laboratory.
Note: Materials may be edited for content and length. For further
information, please contact the source cited above.
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NASA/Jet Propulsion Laboratory (2012, December 3). NASA Voyager 1 encounters
new region in deep space. ScienceDaily. Retrieved December 4, 2012, from
http://www.sciencedaily.com /releases/2012/12/121203154500.htm
Note: If no author is given, the source is cited instead.
Disclaimer: Views expressed in this article do not necessarily reflect those of
ScienceDaily or its staff.
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