Radio telescope for voyager 1 radio signal images
Beijing time on September 18, news, recently, NASA released by a very long baseline array (VLBA) to obtain a traveler 1 radio signal images.Very long baseline array is the national radio astronomy observatory remote radio telescope network.At present, scientists cannot actually see the voyager 1, but can detect the radio signal.Look from the image of the information obtained from the, voyager 1 blue mottled.Allegedly, this picture taken in 21 February this year.
Very long baseline array (VLBA) captures the image information of voyager 1, 11.5 billion miles away.
NASA says travelers 1 has become a the first man-made object to
enter interstellar space, it will still be in the universe to move on
Voyager 1, the current task, is together with voyager 2, to explore the sun reach as far as the border.
This piece of art image shows the voyager 1 and 2 in sheath (heliosheath) areas to explore.Sheath is the sun circle to the outer regions of terminal shock wave, the solar wind interacts with the interstellar matter here, slow, compression or producing turbulence.
"This image obtained by the world's most sensitive ground-based telescopes, shows the voyager 1 radio signals," NASA's jet propulsion laboratory in Suzanne Dodd, voyager project supervisor (Suzanne Dodd) said, "it looks like a piece of blue spots in the ocean of darkness."
Before this, voyager 1 also came to earth a recording, this is it recorded in enter interstellar space.NASA on the tape is analyzed, to think this sound is plasma or vibrations of ionized gas, the plasma wave devices capture detector.Voyager plasma wave survey project principal investigator of the tang dynasty, nita, (Don Gurnett) said: "when you hear
the recording, please realize that this is a historic event. This is a history, our first recordings in interstellar space."
"Voyager 1 above device has detected the vibrations twice, once in October to November, 2012, in April 2013 to may," NASA officials said, adding that "scientists noticed that a rising tone in every encounter. This means that (plasma) density increasing."At present, there is a team with two travelers every day still keep in touch.Since voyager 1 has about 12 billion miles from earth, so information transmission time need to 17 hours.
Voyager 1 launched in 36 years ago, is a plutonium power
detector.Voyager 1, in fact, as early as more than a year ago into interstellar space.Until recently, NASA scientists determined, voyager 1 has been through the sun circle of plasma, into interstellar space.Voyager mission's chief scientist, from NASA's jet propulsion laboratory in Edward Stone (Ed Stone) said: "this is a milestone, but also the beginning of a new journey."
Next, voyager 1 will face a new environment, and the untouched particles, and other phenomenon to explore.Ambassador "star" as humans, voyager 1 carried a copper disk record it, the content of the above including recording greeting with 55 kinds of human language and all kinds of music, pictures, etc., and its purpose is to convey to the accidental encounter "aliens" human greeting.
Voyager 1 one vehicle-timeses compact car, with the size of the above with magnetic fields, cosmic rays and solar wind in the equipment.Monitor traveler 1 last year, scientists noticed some strange phenomenon: the charged particles from the sun suddenly
disappeared.This portends voyager 1 is likely to be close to break through the sun circle boundary.At the same time, scientists have detected the peak appeared galactic cosmic rays come from outside our solar system.
Due to the direction of the magnetic field lines no detectable change, the team speculated that the ship has been very far from us probe is within the scope of the circle of the sun.Circle is the sun in the solar wind blowing into the interstellar matter space formed by the
bubbles.Voyager science team waiting patiently for the change of the magnetic field direction, think it will be voyager 1 through key sign of the sun circle boundary.In the spring of last year, however, a sudden storms around the voyager 1 space produced "echo", has prompted scientists to determine the voyager 1 in August last year has been through the boundary of the circle of the sun.
Voyager team of scientists from the university of Iowa, nita, tang said: "in ten seconds, we finally realized that has entered the interstellar space."Nita, presided over the research, and the results of the study, published online in the journal science.
These new findings are exciting, but "now it is too early to determine," space science professor at the university of Michigan, former NASA officials, Leonard fisker, (Lennard Fisk) said, "we can wait a little longer? Perhaps this can be more clearly how far we go."Leonard, fiske was not involved in the study, he is the direction of the magnetic field changes the lack of data.
Astrophysicist at Harvard University, in contrast, Jonathan McDowell (Jonathan McDowell) are more frank, he said: "unless there is conclusive evidence that it has flown out of the circle of the sun, otherwise I'm not going to believe the results in this two years."Although most people think of voyager 1 has flown out of the solar system, but in fact it also needs to thousands of years, or even tens of thousands of years to say goodbye to the edge of the solar system's most comets.
Voyager 2 is about 9.5 billion miles from the sun.It also need 3 years to reach the boundary of the circle of the sun on the other direction.In the end, the two detectors will run out of nuclear energy, and around 2025 shut down all the equipment.
Voyager interstellar mission
Since voyager 1 and 2 emission, has been in the past 36 years.The two detectors still continued toward the unknown space.Their initial task is to explore the Jupiter and Saturn.In there for a series of Jupiter's moon exploration, such as the discovery of active volcanic activity, as well as
the close observation of complex after Saturn's rings, etc. - the task and expanded.Voyager 1 used Saturn as gravitational slingshot, accelerated over the Pluto.Voyager 2 continue to explore Uranus and Neptune, became the only visit these exoplanets detector.At present, the two detectors common task is to explore the influence on the edge of the area, and the borders of various kinds of particles and other phenomena in interstellar space.