Question: within the next 2-3 years voyegar one will reach... what?

David Freeborn answered on 20 Jun 2013:

Well, we don’t entirely know, which is part of the reason it’s so exciting!

The “heliosphere” is a region of space around by the Sun, which gives off a “wind” of high energy particles. The heliosphere encloses the whole solar system and shields it from cosmic rays from distant galaxy.
We think that Voyager 1 left the heliosphere in March, meaning that it is now outside of the solar system. Voyager 1 saw a 99% decrease in these high energy particles from the sun, but saw many more cosmic rays from distant galaxies.

What it will find next, we don’t know. Voyager 1 is travelling at about 40,000 miles per hour, but space is very, very empty. The nearest star system, beyond the sun is Alpha Centauri, with the three stars: Alpha Centauri A, Alpha Centauri B and the red dwarf star, Proxima Centauri. Proxima Centauri is 25.2 trillion (25,000,000,000,000) miles away, so it would take tens of thousands years for Voyager to reach them, even if it were heading there directly.

Unfortunately, Voyager 1 will run out power much sooner than that- in about 2025, at which point, it won’t be able to send us information. It will keep drifting aimlessly through space, a tiny little piece of human technology, floating amongst the stars for the rest of time.

The most likely thing for Voyager 1 to see is the Local Cloud, a wisp of interstellar flotsam absorbing traces of light from nearby stars. This sits just outside the Heliosphere. It should also be able to send back pictures of the Oort cloud of comets. Some people think these comets go half the way back to Alpha Centauri. Voyager 1 might be able to tell us.

Meanwhile, it’s going to keep sending us amazing pictures. You can see some of its photos of the solar system here:

http://voyager.jpl.nasa.gov/imagesvideo/imagesbyvoyager.html