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On March 17, according to foreign media reports, NASA announced on Wednesday local time that American astrophysicist Eugene Parker died on the 15th at the age of 94. Parker used mathematical methods to successfully predict the existence of solar wind, and NASA's solar probe was named after him < p > < / P > < p > Parker's work focuses on understanding the sun and predicting the existence of solar wind. This is a steady stream of charged particles flowing out of the sun and through the entire solar system. Parker's solar exploration mission, named after him, is to understand the origin of the solar wind inside the sun. NASA and the University of Chicago, where Parker has worked for decades, announced their death < p > NASA Director Bill Nelson said in a statement: "We are saddened to learn that one of the greatest scientific thinkers and leaders of our time has passed away. Dr. Parker's contribution to science and his understanding of the way our universe works are closely related to our work at NASA. Dr. Parker's legacy will continue, and on the basis of his work, NASA will carry out many positive and future missions. ”< / P > < p > Angela Olinto, director of the Department of natural sciences at the University of Chicago, added: "Parker is a legend in our field. His view of the sun and the solar system is far ahead of his time." < p > NASA's Parker solar probe was launched in August 2018 to study the sun's outer atmosphere (i.e. Corona) within a range close to 4 million miles (about 6.5 million kilometers) from the sun's visible surface. The probe used four sets of instruments to study the ultra-high temperature corona in an attempt to understand the origin of the solar wind. The mission is expected to maintain continuous observation until 2025. The probe has returned a large amount of valuable data and detected a long-standing theoretical region where solar radiation will evaporate all cosmic dust < p > the mission, originally known as the solar probe +, was named after Parker in 2017, making him the first living scientist to see the launch of a probe named after him. Parker himself even arrived at the launch site in person, although it was the first time he saw the launch scene < p > Nicola fox, director of NASA's Department of solar physics, recalled: "Anyone who knows Dr. Parker knows that he is a visionary man. I am honored to stand with him at the launch ceremony of the Parker solar probe. I am happy to share all the exciting scientific achievements with him and see his face glow in every new image and data I show him. Although Dr. Parker is no longer with us, his discoveries and The legacy will last forever. " < p > Parker was born in Horton, Michigan in 1927. He received a bachelor's degree in physics from Michigan State University in 1948 and a doctor's degree from California Institute of technology in 1951. He began as a lecturer and assistant professor at the University of Utah < p > according to the statement of the University of Chicago, Parker joined the University of Chicago in 1955, where he studied astrophysics for 67 years. Two years later, he realized that the sun's overheated corona should theoretically produce charged particles leaving the sun's surface at high speed. But Parker recalled in 2018 that other scientists didn't believe him and thought he was "talking nonsense" < p > finally, Parker's colleague at the University of Chicago, Subrahmanyan Chandrasekhar, supported him. Just a few years later, the evidence Parker needed appeared. In 1962, NASA's mariner 2 probe (NASA's first interstellar mission) discovered the solar wind during its journey to Venus < p > over the next few decades, Parker extended his research to cosmic rays, the Galactic magnetic field and other areas of astrophysics. Because of his wide range of interests, many scientific concepts are named after him. "Parker's name can be found everywhere in astrophysics, such as the Parker instability describing the magnetic field in galaxies, the Parker equation describing the motion of particles in plasma, the swift Parker model of the magnetic field in plasma, and the Parker limit of magnetic monopole flux," the University of Chicago wrote < p > Parker also served twice as chairman of the Department of astronomy and Astrophysics at the University of Chicago and the Department of astronomy at the National Academy of Sciences. He retired in 1995, but remained active in Astrophysics until shortly before his death < p > astrophysicists at the University of Chicago Robert Rosner, Parker's longtime colleague, said: "In my opinion, Parker is the representative of the perfect physicist. He is brilliant, accomplished, elegant, articulate, but also very modest. I will never forget his happiness in exploring scientific problems and his excellent physical insight. People will never forget that he encouraged everyone who interacted with him, including his students and colleagues. His death is very important to us It's a huge loss for all of us. " (small) < / P > < p >

2023-03-22 10:04:51