  We report on the latest measurements of the production of $\Upsilon$ mesons
in heavy-ion collisions from the STAR experiment at RHIC. New measurements of
the nuclear modification factors of the $\Upsilon$(1S+2S+3S) and $\Upsilon$(1S)
states in U+U collisions at $\sqrt{s_{NN}}$ = 193 GeV are presented as a
function of the number of participants ($N_{part}$) in the collisions. In
addition, the suppression of $\Upsilon$(1S) and $\Upsilon$(2S+2S) is presented
versus the quark-antiquark binding energy. Preliminary results on Upsilon
suppression in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV, reconstructed via
the dimuon channel, are also reported.

High Energy Physics - Experiment;Nuclear Experiment