  Quantum information experiments applying quantum optics in outer space with a
very long baseline may have advantages over the current earth-bound experiments
or the earth-to-satellite experiments because they can minimize the loss in
light transmission and maximize the gain in time resolution. This future class
of experiments, amongst them quantum teleportation and entanglement swapping,
can shed light on many fundamental theoretical issues in gravitational quantum
physics and relativistic quantum information. Regarding relativity theory,
these experiments in an outer-space setting can involve observers at spacelike
and timelike separations and explicate intriguing phenomena from different
choices of time-slicing. Regarding quantum information, they may be able to
ensure the causal independence of the expectation values in the Bell test.
These issues are addressed in this paper with analysis and explanations.
