  We have used GALEX observations of the North and South Galactic poles to
study the diffuse ultraviolet background at locations where the Galactic light
is expected to be at a minimum. We find offsets of 230 -- 290 photon units in
the FUV (1531 \AA) and 480 -- 580 photon units in the NUV (2361 \AA). Of this,
approximately 120 photon units can be ascribed to dust scattered light and
another 110 (190 in the NUV) photon units to extragalactic radiation. The
remaining radiation is, as yet, unidentified and amounts to $120 -- 180$ photon
units in the FUV and $300 -- 400$ photon units in the NUV. We find that
molecular hydrogen fluorescence contributes to the FUV when the 100 $\mu$m
surface brightness is greater than 1.08 MJy sr$^{-1}$.
