Both Voyagers carry

a message from Earth

on a phonograph

record protected by an

inscribed golden disc.

Before 2020, Voyager will

likely cross into the

heliopause — where the

region of space dominated

by particles streaming

from the Sun ends and

interstellar space begins.

VoyagerT H E I N T E R S T E L L A R M I S S I O N

The twin Voyager

spacecraft are

exploring regions

of space never

before encountered

as they leave the

solar system.

Voyager 1 has

traveled farther

from Earth than

any other human-

made object.

Heliopause

Heliosheath Heliosphere

Termination Shock

Voyager 1

Voyager 2

National Aeronautics and Space Administration

Heliopause