  The momentum and helicity density distributions of the strange quark sea in
the nucleon are obtained in leading order from charged-kaon production in
deep-inelastic scattering on the deuteron. The distributions are extracted from
spin-averaged K+/- multiplicities, and from K+/- and inclusive double-spin
asymmetries for scattering of polarized positrons by a polarized deuterium
target. The shape of the momentum distribution is softer than that of the
average of the ubar and dbar quarks. In the region of measurement 0.02 < x <
0.6 and Q^2 > 1.0 GeV^2, the helicity distribution is zero within experimental
uncertainties.
