> I am using gnuplot to produce plots for Astronomy papers. Now I first
> tried to plot something in "solar" units, where "solar" is denoted by a
> circle with a dot in the middle (the \odot from LaTeX). Is that
> possible somehow with gnuplot's enhanced PS terminal, or do I have to
> use a LaTeX-like terminal (which I would not really like).
The capabilities of gnuplot in this area are dominated by those of the
output format. In the case at hand, this means that if you manage to
find some PostScript font with such a symbol in it (might be findable
in Symbol or DingBats...), and its code position, you can have gnuplot
generate it. Your plot may no longer output correctly on all
PostScript output devices, though, for lack of that particular font.
Even if all the snow were burnt, ashes would remain.