voyager 1 and 2 is the deep space probe launched in 1977, now has to fly to the edge of the solar system.They are walking alone in the infinite space, monotonous data sent back on time every day, who also don't know whether they have flew out of the solar system, after all, we can't go to take a photo as evidence for them.In 2015, the United States, Wesleyan university astronomers suddenly remind of the two lonely pioneer, should look at what happened to them?
the Hubble space telescope was transferred to track their whereabouts, could not have pictures of them, of course, even the look is hope.On their way forward, however, scientists have discovered the mysterious interstellar cloud, a piece of voyager 1 way, way of no. 2, there are two.Detect the electron density in the cloud, researchers found the interstellar dust particles with different density, moreover also detected in the interstellar medium magnesium, iron, carbon and manganese charged ions, as well as electrically neutral oxygen, nitrogen and hydrogen, suggests that the spacecraft has entered a very rich and complicated indeed interstellar environments.These Hubble data can and travelers number 1, 2, compare the data collected, in order to help the scientists analyzed the interstellar flight may face challenges in the future.
voyager 1 is known in earth's history the fastest flight, flight farthest man-made object, is now at a speed of 61000 km/h, rushed out of the surrounding area of the heliosphere in the solar system, and navigation in interstellar space, about 20.6 billion kilometers from earth.About 40000 years later, it will be within a distance of 1.6 light-years across Ophiuchus gliese 445, the star is at a speed of 119 km/s coming straight toward earth high speed, the distance of 17.6 light-years, voyager 1 and meet it, only 3.45 light-years away from earth than it will be.
voyager 2 has yet to enter interstellar space, 17 billion kilometers away from the earth now, 40000 years later, it will be within a distance of 1.76 light-years across Andromeda rose to 248, this star is currently is 10.3 light-years from earth.
due to the gradual decay of the radioactive plutonium fuel cells, two of the aircraft power supply has been declining, all kinds of instruments have been gradually closed, by 2036, even the signal transmission capacity will be lost.The two left wandering the earth wouldn't have any chance to return to their homes, billions of years, they will join hundreds of billions of stars, revolve around the galactic center.
but the voyager 1, 2, carries a record, a record of all kinds of information of mankind, including Chinese mandarin, the ancient music of violin "water" and so on, to the extraterrestrial publicity civilization development results.Hawking warned that humans don't try to contact some aliens seems to come late, hope they don't intercept to the record, at least don't have the player to put these things.
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