1.   He rolled the pod around its gyros, and used full thrust to break his orbital speed.

2.   Her orbital speed must be a few hundred meters per second.

3.   More precisely, the square of the orbital speed is inversely proportional to the orbital radius.

4.   The other is an orbital speed that corresponds not to falling or rising but to going around the Earth.

5.   With both vessels traveling at the same orbital speed, the impact speed is less than one-tenth of a foot per second.