( An SwRI-led study sheds light on the deceleration of the solar wind as it journeys away from the Sun and interacts with and picks up interstellar material. NASA's New Horizons spacecraft measured the solar wind as it traveled from just beyond Uranus' orbit into the outer Kuiper Belt (red shaded region), detailing the gradual slowdown caused by interactions with interstellar materials (red line). Credit: Southwest Research Institute ) ( Two Interstellar Travelers This illustration shows the position of NASA's Voyager 1 and Voyager 2 probes, outside of the heliosphere, a protective bubble created by the Sun that extends well past the orbit of Pluto. Voyager 1 crossed the heliopause, or the edge of the heliosphere, in August 2012. Heading in a different direction, Voyager 2 crossed another part of the heliopause in November 2018. https://photojournal.jpl.nasa.gov/catalog/PIA22835 ) 나사의 뉴호라이즌스 탐사선은 지난 2015년 명왕성을 탐사하고 2019년 인류가 직접 탐사한 가장 먼 천체인 소행성 아로코트를 지나 태양계 외곽으로...
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