The Ulysses space probe is the first heliospheric mission to carry out
in situ observations over all solar latitudes. It is providing a uniq
ue set of fields and particles data which will allow a quantitative mo
delling of the three-dimensional heliosphere. This paper reviews highl
ights of the observations made on board the Ulysses spacecraft over a
range of heliolatitudes from near the ecliptic plane to the southern p
olar regions of the Sun.