The Voyager spacecraft is more than 20 billion km away from us. Voyager and Voyager 2 were launched in 1977 to explore the outer planets of the solar system and continued their journey after completing their primary missions. Today, Voyager 1 is the farthest man-made object from Earth. At a distance of 21 billion km, even signals take hours to get there.

But have you ever wondered how NASA is still in contact with these two spacecraft? The answer is the Deep Space Network! But how does it work? The second episode of 'Ever Wondered' provides the answer!

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