Time Travel has fascinated the minds of scientists and authors alike. Many theories have been formulated, many stories have been written where time could be bend or traveled in such a way that it could make a passage from one point in time to another. Being it forward or the less plausible backward around.
And while time has always been taken into consideration for the probability of time traveling, there is however one major other that has mostly been overlooked at. That other is space, and that's where the Vandenberg Non-probability comes into view.
Imagine that a time machine could be build, and like many a stories have formulated it comes with a device to actually set your destination point in time. Let's say the time machine is set up in New York and the buddying time traveler choose to move something like a year in time. Forward or backward in time, I leave that open since it is not important for this demonstration.
Well everyone assumes our time traveler will have moved or jumped that year in time and will end up again in New York. Not so, and that's the whole point of the Vandenberg non-probability.
Because and while the time machine may have stayed at first sight on the same location on earth. Earth however is not a permanent location in space. It moves on a axis and swirls around the sun, which in turn moves with the rest of our galaxy. After a year of permanent moving around who knows where our time traveler would end up?
That is exactly what the Vandenberg non-probability is about: time traveling on moving objects like planets renders the probability of a successful move in time to zero, hence the non-probability.
Secondly, all our references in space are based upon moving objects, everything moves; stars, planets, galaxies... To plan and measure out something that wouldn't move in space has the same non-probability as the move or the jump itself: it's virtually impossible.