In order to continuous communication with lunar orbiter and even far side station at the back of Moon, Lagrange points
L1, L2, L4 and L5 is considered to be candidates for relay satellites or orbiters in the Earth-Moon restricted three body
system. Positions of Lagrange points in solar system including Earth-Moon system were calculated and missions before
and future around these points, especially Sun-Earth L1 and L2 were listed. Lagrange points satellites, orbiters and local
networks on the ground of a celestial body will constitute a planetary networks connected by an interplanetary backbone
in the whole architecture of Inter PlaNetary Internet.
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