Gnuplot Astronomical symbols in Gnuplot?

[Sanzia]

Hello,

I would like know how I can write sun symbol ($\odot$) in Gnuplot, in the ps mode, without using the psfrag in Latex document...

Actually, I use the

M_{{/=12 O}&{/*-.56 O}{/=12 \267}}

but, I don't like that... It's so ugly!!!

Gracias!!!

Sanzia