WATCH: NASA's Voyager 2 has entered interstellar space after 41 years

WATCH: NASA's Voyager 2 has entered interstellar space after 41 years https://s.abcnews.com/images/GMA/181211_gmaday_nasa_hpMain_16x9_992.jpg

WATCH: NASA's Voyager 2 has entered interstellar space after 41 years

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Now Playing: NASA's Voyager 2 has entered interstellar space after 41 years

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