I know that Venus has been visible, in principle, for half an hour or so after sunset. But I haven't seen it yet. At this time of year (I think this is right) the ecliptic lies rather flat to the horizon around sunset, so by the time it gets dark enough Venus is very low, and I don't have convenient places around here with a clear view to the West. It's too bad, because I missed a nice conjunction with Jupiter. Anyway I should make a more serious effort soon.