1.   But the lunar gravity field was then so poorly mapped that the chances of achieving a successful preprogrammed landing were very small.

2.   Although tidal wave is in general use, its scientific usage is restricted to a sea wave due chiefly to the effects of lunar gravity.

3.   Alan Shepard drove a golf ball in the low lunar gravity to a distance Tiger Woods would die for.

4.   Lunar gravity, about one-sixth of what it is here, would remain a significant factor indoors, rendering certain sports impossible.

5.   The balls sailed in the low lunar gravity.

6.   Use the force of lunar gravity to sling the crippled spacecraft around the back side of the moon and back toward earth.