The route map of the farthest probe from humanity to fly away from the solar system. Artistic picture of one of the Voyager "Sister Flowers" detectors. Image source: Since the launch of Pioneer 10 in 1972, five spacecraft have been heading outside the solar system. They are Pioneer 10, 11, Voyager 1, 2 and New Horizon. At present, these detectors have completed their original missions, but they have not stopped. Some are still working overtime to explore more secrets of the universe for mankind; Some have lost contact with the earth and are moving towards their own goals alone. In its recent report, the US Space Network sorted out the status of these detectors. The Voyager "overtime" in 1977, the Voyager probes with different tasks set sail successively and began their own adventure. In 2022, the Voyager mission celebrated its 45th anniversary. From flying over multiple planets in close range to exploring the longest distance of human beings in space, this has made great contributions to "Sister Flower" in enhancing people's understanding of the solar system. In 1990, after the successful completion of the Voyager 1 mission, in order to save energy, scientists asked it to look back at the earth for the last time before rushing towards the distance. After taking the famous "dim blue dot" picture, they turned off its camera. However, other instruments on the spacecraft are still collecting data from the solar plasma and magnetic field. In 2012, Voyager 1 flew out of the heliospheric top, broke away from the influence of the solar wind, and headed out of the solar system. It became the farthest flying artificial probe, reaching a distance of 23 billion kilometers from the earth. At present, it is moving towards the deeper universe with human information. In 1986, Voyager 2 arrived at Uranus, becoming the first probe to visit Uranus. In 2018, Voyager 2 also flew out of the heliosphere and towards the far edge of the solar system. However, the "sister flowers" have only left the heliosphere, and it will take at least ten thousand years to fly out of the solar system. Their main task now is to explore the end point of the influence of the sun and the starting point of the influence of other stars. The edge of the solar system is also full of surprises. Previously, scientists believed that when leaving the center of the solar system, the plasma from the sun would become more sparse and scattered, but in fact, Voyager encountered a more dense plasma after crossing the heliospheric top, which still puzzled astronomers. Pioneer has lost contact with Pioneer 10, which was launched in 1972, and Pioneer 11, which was launched in 1973, which is of pioneering significance in the history of space exploration. Pioneer 10 was the first probe to successfully cross the asteroid belt, and also the first probe to observe Jupiter at close range. Then it flew over Saturn. Since Pioneer 10 was launched a little earlier, it was once the farthest probe from the earth. Before its complete loss of contact with the earth in 2003, it was about 12.23 billion kilometers away from the earth, which was later surpassed by Voyager 1. The fuel carried by Pioneer 10 has long been exhausted, and it is currently relying on
Edit：Ying Ying Responsible editor：Wang Chen
Source：digitalpaper.stdaily.com
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