Re: This makes me wonder . .
" if you go high enough, that _will_ be enough to stay in orbit"
Well, much higher is one way to put it, but basically yes. According to the first online orbital calculator I could find, approximately two million kilometers up the orbital speed happens to be almost exactly the 1600 km/h we have standing on the equator. That of course means pretending the Sun or the Moon have nothing to say about the issue (I'm sure they both do), but, basically, two million kilometers straight up you can apparently indeed stay up indefinitely...