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World's Largest Single-Dish Radio Telescope

#00017 / Space

First Human-Made Object to Enter Interstellar Space

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2012-08-25 date

Voyager 1

Heliosphere boundary

NASA reports that Voyager 1 crossed the heliosphere's boundary on 25 August 2012, becoming the first human-made object to enter and measure interstellar space.

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World's Longest Railway Tunnel

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