  Momentum feedback from super-Eddington accretion offers a simple explanation
for the observed M-sigma and M-M_{spheroid} relations between supermassive
black holes (SMBH) and the spheroids of their host galaxies. Recently Ferrarese
et al. and Wehner & Harris observed analogous relations between the masses of
central star clusters and their hosts. We show that stellar winds and
supernovae from such nuclear clusters (NC) give similar feedback explanations
for this case also, and we discuss the connection to the Faber-Jackson relation
for the spheroids themselves.
