Together they form the heliosphere within the surrounding local interstellar medium – the plasma, neutral particles and dust that fill the space between stars and their respective astrospheres.

Without the protection of the heliosphere, Earth would have been exposed to the interstellar medium. This means our planet's atmosphere may have been affected by the combination of gas ...

Both probes have departed the heliosphere, the vast magnetic bubble ... of the sun’s influence and the beginning of the interstellar medium, sometimes called “empty space” but suffused ...

Physicists believe these electrons in the interstellar medium are reflected off of ... At one point in time, both probes went past the heliosphere. That is where solar winds emitted from ...

NASA’s Voyager 1 and 2 are the only probes to cross into interstellar space, but their outdated instruments can’t fully analyze the heliosphere’s boundaries. The heliosphere blocks cosmic ...

If Voyager 1 does manage to leave the heliosphere before it runs out of power around 2025, the spacecraft will probe the Local Cloud, a wisp of interstellar flotsam absorbing traces of light from ...

In 2018, Voyager 2 crossed the heliosphere’s boundary, officially entering interstellar space and transmitting data from beyond the Sun’s influence. Despite the shutdowns, Voyager 2 continues ...