Knowing it has exited the solar system, is it traveling in the direction of the center of the galaxy, away from it, orbiting it, or maybe even going perpendicular from the disk-shaped galaxy?

  • $\begingroup$ Trying to impress my less than astronomical friends about how terrific spaceflight and science is, I have a couple of times pointed to some place on the night sky which looks good at the moment and said: "There, there is Voyager 1, just now leaving the Solar system!" (If I don't know, then certainly they don't know, so my fraud is safe). It is universally liked, although I have no clue to where it really is. The follow up question is inevitably: "And where is Voyager 2?" (Don't know, it is hiding behind Venus for the moment) $\endgroup$
    – LocalFluff
    May 10, 2015 at 18:48

1 Answer 1


Stars and gases at a wide range of distances from the Galactic center orbit at approximately 220 kilometers per second.

From Wikipedia

That's much faster than the Voyager probes relative to the Sun (Voyager 1: 17 km/s). Hence the probes will orbit the galactic center roughly the same way as our Solar System, even after occasional hyperbolic encounters with other stars.

Voyager 1 is travalling in the direction of Ophiuchus, seen from Earth. She's at or beyond the border of the heliosphere.

  • $\begingroup$ Are they then on the same orbit as our solar system, but slightly ahead of us? Will the distance be increasing between the voyagers and solar system on this orbit? $\endgroup$
    – Ska
    Jan 7, 2014 at 1:40
  • $\begingroup$ The distance will be increasing for the next few million years; they are faster than the escape velocity from the sun. But they won't escape from the Milky Way, unless they get accelerated by an unpredictable close encounter to a star in a very distant future. $\endgroup$
    – Gerald
    Jan 7, 2014 at 2:39
  • 1
    $\begingroup$ ...Eventually the probes may again come closer to our solar system, but only in timescales of about a galactic year (en.wikipedia.org/wiki/Galactic_year), hundreds of millions of years, if they follow Kepler ellipses around the galactic center. But that's hard to predict over such long time scales. $\endgroup$
    – Gerald
    Jan 7, 2014 at 2:45
  • $\begingroup$ Why Ophiuchus? Some specific reason? $\endgroup$
    – Magno C
    Feb 4, 2014 at 11:49
  • 1
    $\begingroup$ That's probably just a consequence of the Saturn flyby, coming from Jupiter. $\endgroup$
    – Gerald
    Feb 4, 2014 at 14:50

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