1.   A few days later, it will enter lunar orbit.

2.   Aldrin sat on the White House stage Wednesday along with Michael Collins, who piloted the command ship Columbia in lunar orbit during the moon walk.

3.   Five days later, it became the first dedicated U.S. moon mission to enter lunar orbit since Apollo.

4.   It should arrive in lunar orbit early Monday morning.

5.   Kelly helped develop the lunar orbit rendezvous concept that made the Moon landings possible with the rocket power available at the time.

6.   Once in lunar orbit, two of the explorers would venture to the surface, where they might spend up to a week living and working in inflatable housing.

7.   Later, the moon explorers would rocket back into lunar orbit and rejoin a crewmate aboard the command ship for the trip back to Earth.

8.   Michael Collins remained in lunar orbit aboard the command ship Columbia.

9.   Japan has previously put two probes into lunar orbit, but has yet to develop a landing vehicle.