The other side does glow, iirc, the light does get scattered, but it's very soft :)
similar ot why a lunar eclipse is red, the light gets refracted and scattered by the edge of our atmosphere and thus shifts to red, and then hits the moon.

remember, most cameras cna't pick up the fiant light our eyes can.

Space doesn't have much ambient light (no atmosphere), there is some from stars, but it's swamped out in pictures by the harsh Sun light.

Very very well done!! :)
did you add a speculairty channel for the ocean? that's only bit that looks to matte.

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