Page:The evolution of worlds - Lowell.djvu/287

Rh 5 PLANETS AND THEIR SATELLITE SYSTEMS If we compute the speeds of satellites about their primaries in the solar system and compare them with the velocities in their orbits of the planets themselves, a striking parallelism stands displayed between the several systems.

This is shown in the following table of them:

The relations here disclosed are too systematic to be the result of chance.