Interstellar Frontier

Deep Space

The probes leaving the Solar System — and the space between the stars.

A handful of spacecraft are on one-way journeys out of the Solar System, still returning data decades after launch from distances where sunlight is a faint star and a radio round trip takes the better part of a day. They are humanity’s farthest reach, and our first physical contact with interstellar space.

See Pluto in the Solar System ExplorerThe Kuiper Belt’s king — a frozen world with a heart.Live deep-space telemetryDeep Space imagery in the Gallery

Missions to Deep Space

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Voyager 1

NASA · Interstellar Space

Voyager 1

The most distant human-made object, now travelling through interstellar space. Launched in 1977, transmitting data from over 23 billion km away.

Active5 Sep 1977

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