Press Center of India
December 12, 2018 12:40
NASA's Voyager 2 became the second human object in history to reach the end of the solar system after the spacecraft left the protective balloon of particles and magnetic fields created by the Sun.
His twin Voyager 1 crossed this border in 2012, but Voyager 2, launched 41 years ago, brings a working tool that will provide prime-quality observations about the nature of this entry into the interstellar space.
Voyager 2 is now just over 18 billion kilometers from Earth, NASA said declaration,
As the probes left the heliosphere, Voyager 1 and Voyager 2 have not yet left the Solar System and will soon leave the US space agency.
The end of the heliosphere
By comparing the data from various instruments on a spacecraft, mission scientists found that the probe had passed the outer edge of the heliosphere on November 5th.
This limit, called the heliopause, is where the complex, hot, sunny wind meets the cold, dense, interstellar environment. The mission operators can still communicate with Voyager 2 when entering this new phase of their journey, but information moving at the speed of light takes about 16.5 hours to travel from a space ship on Earth.
For comparison, the light that travels from the Sun takes about eight minutes to reach the Earth.
The most convincing proof of leaving the Voyager 2 heliosphere comes from the Plasma Science Experiment (PLS), a tool that stopped working on Voyager 1 in 1980, long before the probe crossed the heliopause.
"Work on Voyager makes me feel like a researcher because everything we see is new," says John Richardson, PLS tool investigator.
"Although Voyager 1 crossed the heliopathy in 2012, he did so in a different place and time and without PLS data, so we still see things that nobody has seen before," said Richardson, senior researcher at Massachusetts Technology institute in the United States.
Explore the interstellar space
In addition to plasma data, Voyager scientists see evidence from three other onscreen instruments, the cosmic rays subsystem, the low energy particle tool, and the magnetometer, according to the conclusion that Voyager 2 has gone through heliopause.
"There is still much to be learned about the area of interstellar space just after the heliopause," said Ed Stone, a Voleyard scientist based in Caltech in the United States.
Together, the two warriors provide a detailed insight into how our heliosphere interacts with the constant interstellar wind that flows beyond.
Their observations are complemented by data from NASA's Space Border Interceptor (IBEX), a mission that remotely captures this limit.
NASA is also preparing an additional mission – the forthcoming Interstellar Mapping and Acceleration Study (IMAP), which will begin in 2024 to benefit from the voyagers' observations.
Voyager 2 started in 1977, 16 days before Voyager 1, and they both traveled far beyond their original destinations. Spacecrafts have been built for the past five years, and have conducted close research on Jupiter and Saturn.
However, as the mission continued, it was possible to fly further on the two furthest giant planets – Uranus and Neptune.
As the spacecraft flew through the solar system, reprogramming of the remote control was used to give the soldiers greater opportunities than they had when they left the Earth.
Their five years of life have stretched to 41 years, making Voyager 2 the longest-running mission of NASA.