Press Trust of India
Dec 12, 2018 12:40 IST
Voyager 2 & # 39; NASA's second human-made object in history to reach the edge of the solar system, after the space left by the protective bubble & # 39; particles and magnetic fields created by the Sun, the agency announced.
The Voyager 1, crossed this border in 2012, but Voyager 2 – launched 41 years ago – has a device & # 39; work will provide the first observations of nature & # 39; this gateway to interstellar space.
Voyager 2 is now slightly more than 18 billion km from Earth, NASA said in statement.
While the left EKOSFERA probes, Voyager 1 and Voyager 2 have prevented the solar system, and will not leave immediately, the US space agency said.
Edge & # 39; the elliosfera
Comparison & # 39; data from different instruments aboard the spacecraft to throw the tracks, mission scientists determined that the probe crossed the edge of & # 39; outer heliosphere on 5 & # 39; in November.
This limit, called heliopause, is where the soft breeze and hot sun meets the cold interstellar medium and dense. The mission operators can still communicate with & # 39; Voyager 2 as comes in & # 39; this new phase of her journey, but the information – to move b & # 39; the speed of light – take about 16.5 hours to travel from space to Earth.
B & # 39; comparison, light travels from the Sun takes about eight minutes to reach Earth.
The most convincing evidence of the issue of Voyager 2 from ħelożphere comes from Plasma Scientific Experiment board (PLS), instrument stopped working on Voyager 1 in 1980, long before that probe crossed the heliopause.
"Working on Voyager nagħmilni feel like an explorer, because everything we see it again", said John Richardson, principal investigator for the instrument pls.
"Even though Voyager 1 crossed the heliopause in 2012, did it in & # 39; a place and at & # 39; different time, and without pls data. So we see things that nobody has seen before," said Richardson, leading research scientist at the Massachusetts Institute of Technology (MIT) in the United States.
Probing interstellar space
In addition to plasma data, the members of the science team & # 39; Voyager saw evidence of three board other instruments – the subsystem kosmiku beam, the instrument particle b & # 39; fuel low and magnetometer – consistent with the conclusion that Voyager 2 crossed the heliopause.
"There is still much to learn about the region & # 39; interstellar space immediately beyond the heliopause," said Ed Stone, Voyager project scientist based in the & # 39; Caltech in the United States.
Together, the two Voyagers provide detailed idea & # 39; as our elliosfera wind interacts with the constant inter istellari emitted from behind.
Their observations complement data from the Interstellar Boundary Explorer (IBEX) NASA, mission to eliminate remote that border.
NASA is also preparing additional mission – the interstellar Mapping and Acceleration Probe (IMAP) Next, launched in 2024 – to capitalize on the Voyagers observations.
Voyager 2 launched in 1977, 16 days before Voyager 1, and both traveled beyond their original destinations. The spacecraft was built for five years and to closely studies & # 39; Jupiter and Saturn.
However, as the mission continued, it was possible to make an additional flyby two outermost giant planets, Uranus and Neptun.
As the spacecraft was going from the solar system, the reprogramming of & # 39; remote control used to give the Voyagers greater capabilities than it had when it left on the Earth.
The lifespans of & # 39; their five years have been stretched to 41 years, and Voyager 2 made the longest run of mission & # 39; NASA.