Let me address the last question first. There is no way for these probes to leave the galaxy. They would need to be going 500-1000 miles a second faster than they are (relative to us) to be able to escape the gravity of the Milky Way. I think they're going about 4 miles a second.
Originally Posted by Gomar
The particulars of which direction is right and which direction is left were left to the artist. The Sun is moving with respect to the center of the galaxy... that's just an orbit. It is also moving with respect to the local medium, and some of the newer stars in this area... THAT is the movement that is causing the bow shock and wake.
the solar system moving right to left. Is that so?
I'm not sure what trip you're talking about. Voyager 1 is powered by heat from the radioactive decay of something with an 88 year half-life. It will probably be cold and powerless before it gets further than the aphelion of Sedna. Reporting back from the Oort cloud, or from the one-light-year milestone are not possible.
so as to meet up with the spiral arm after ours, thereby shortening the trip?
Forming opinions as we speak