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If the "nebular theory" of the universe be true, this is unquestionably the exact condition of things in the Milky-way. Of the more distant stars in this crowded galaxy, we can only catch, even in the telescopic field, mere glints of light as the intervening swarms of stellar and planetary worlds thicken in the foreground and shut out the more distant view.

Tycho was destined to lay the foundation of modern astronomy, by a vast series of accurate observations made with the largest and the finest instruments; it was the proud lot of Kepler to deduce the laws of the planetary orbits from the observations of his predecessors; while Galileo enjoyed the more dazzling honour of discovering by the telescope new celestial bodies, and new systems of worlds.

Alongside this we may put the rhythm of the tides, coincident with the phases of the moon. Together with all other rhythmic events of equal periodicity, it is itself the effect of the activity of a force-sphere constituting the cosmic realm to which the relevant planetary body belongs.

Perhaps in their mutual absorption he and Andra became careless. They had entered a planetary system, he recalled, and he had casually manipulated the controls. His perceptive faculties detected a tiny spurt of flame somewhere out of sight in the control bank, then the potent engines reacted out of control for a critical instant near planetary mass.

These beings who, in a certain sense, may be called man’s ancestors, had as yet no ego, but they developed the three other principles and their mutual relationship to such a point that they became sufficiently mature to receive an ego. Thus man’s ancestor attained to a certain degree of maturity of his three principles during the earlier planetary incarnation.

There was a maximum distance beyond which space-combat was impractical; beyond which missiles became mere blind projectiles moving almost at random and destroying each other without regard to planetary loyalties. There was also a minimum distance, below which missiles were again mere projectiles and could not greatly modify the courses on which they were launched.

This was accompanied by a rather apologetic personal message from Grauffis now Prime Minister to the effect that His Majesty felt compelled to stand on his royal dignity at all times, and that, after all, there was a difference between the position and dignity of the Duke of Wardshaven and that of the Planetary King of Gram. Prince Trask of Tanith couldn't quite see it.

He broke it. "Now," he said, "Maril's an agent of yours. She can add to what I've told you. I'm Med Service. I have a job to do here to carry out what wasn't done before. I should make a planetary health inspection and make recommendations for the improvement of the state of things. I'll be glad if you'll arrange for me to talk to your health officials.

In the same letter Hamilton also alludes to the success which had attended the applications of his methods in other hands than his own to the elucidation of the difficult subject of Planetary Perturbations. Even had his contributions to science amounted to no more than these discoveries, his tenure of the chair would have been an illustrious one.

Does the attraction for both of them follow the same law as to distance as is given by the planetary motions round the sun? It has been stated that in this way the first conception of universal gravitation arose.