No definitions found for 'orbiting geophysical observatory'
Perhaps one of these:
orbation,
ore bed,
orbitary,
orbit,
orbiting,
orbitude,
orbituary,
oarfoot,
orbitale,
our father,
orbit period,
orbital,
orbitosphenoid,
orbital cavity,
oar-footed,
orvietan,
orbitosphenoidal,
oreb the rock of,
orbital rotation,
orbity,
oreopteris limbosperma,
orbital index,
orbital motion,
orbed,
orbiter,
orbitolites,
orbital plane,
orbitar,
orbitual,
orbital point,
orvet,
orbitelae,
orbate,
orbitonasal,
orovada,
orbital mechanics,
oreopteris