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Updated: June 16, 2025
But in Kepler's case the obviously implied physical theory of the planetary motions, even before Newton explained the simplicity of conception involved, made astronomers quite ready to waive the claim for a rigid proof of the earth's motion by measurement of an annual parallax of stars, which they had insisted on in respect of Copernicus's revival of the idea of the earth's orbital motion.
While revolving, the cross rotates about its traveling center, A, in the opposite direction, the contact between the two circles being internal, and at a rate equal to that of the rotations of C and D, because the velocities of the axial and the orbital motion are to each other as f is to F, that is to say, as 1 is to 2.
This may be in the lymph drainage system of the eye; but it may also be in the ocular veins themselves. Experimentally the eyeball can be made to burst by tying all the venous outlets from it. I have seen very high intra-ocular tension develop in a few hours after general thrombosis of the orbital veins. The absence of the canal of Schlemm is noted in congenital buphthalmos.
Temporarily he was baffled by the placid Cow's literal translation of his request as one for any actual velocity, since she had replied with a figure very close to their original orbital speed. "What is our velocity at right angles to original course?" he inquired. And the Cow's reply came: "Two-o-o hundred and fifty-seven point seven six ce-entimeters per se-econd."
The meteoric hypothesis was naturally extended from the maintenance of the sun's heat to the formation of the bodies circling round him. The earth no less doubtless than the other planets is still growing. Cosmical matter in the shape of falling stars and aërolites, to the amount, adopting Professor Newton's estimate, of 100 tons daily, is swept up by it as it pursues its orbital round.
H. A. Newton makes some astounding estimates on this subject that the orbit of the earth is filled with meteorites, about 250 miles apart, making a group of about 30,000 in a space equal to that of the earth. If such calculations are reliable, the query must arise, How much effect can such a meteoric shower every day in the year exert on the orbital motion of the earth, in retarding its velocity?
We've got to combine the velocities of the orbits, so that when we do spring Junior loose, he'll gain in speed!" "But how do we get the orbital speeds to help us, Major?" asked Alfie. His glasses had slipped to the very end of his nose. "If you'd give the major a chance, he'd tell you, Big Brain," drawled Roger. Alfie gave Roger a withering look and turned back to the major.
Plenty of times she used to scold him for not having his translations of Caesar worked out. A lot she understood about a fella who had to spend plenty of time working to support himself, while attending school! "Good evening, Miss Parks," he greeted rather stiffly. "I think it was that manned weather satellite dumping garbage. It hits the atmosphere at orbital velocity, and is incinerated."
The near future will hold such wonders as the orbital flight of an astronaut, the landing of instruments on the moon, the launching of the powerful giant Saturn rocket vehicles, and the reconnaissance of Mars and Venus by unmanned vehicles. The application of atomic energy to industry, agriculture, and medicine has progressed from hope and experiment to reality.
"We can make it I think," Frank Nelsen said, speaking low and quick, and with the boldness of an enlivened body and brain. "We'll shoot up, out of the Belt entirely, then move parallel to it, backwards contrary to its orbital flow, that is. But being outside of it, we won't chance getting splattered by any fragments. Probably avoid some slobs, too. We'll decelerate, and cut back in, near Pallas.
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