So far, what is the furthest space exploration machines have been able to reach in the universe? Thanks.
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1$\begingroup$ Duplicate question: space.stackexchange.com/q/3010/265 . $\endgroup$– Mark AdlerCommented May 30, 2016 at 23:42
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$\begingroup$ Thanks, I did not know Voyager one from 1977 was still around. $\endgroup$– Jack MaddingtonCommented May 31, 2016 at 8:09
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