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Updated: May 2, 2025
An aeroplane travelling at a high speed, and pursuing an undulating or irregular trajectory is almost impossible to hit from the ground, as sighting is so extremely difficult. Sighting from another machine, which likewise is travelling rapidly, and pursuing an irregular path, is far more so.
Turtle shooting, that form in which the arrow is discharged directly upward and is supposed to drop on the mark, is difficult and attended with few hits, but it trains one in estimating wind drift. An archer should also learn the elevation or trajectory at which his arrows fly at various distances. Shooting in the woods over hanging limbs may interfere with a good shot.
"Gad!" thought he, as the Pauillac swept its long, flat-arc'd trajectory through the night, "under any circumstances this must be a terrific wrench for them. Talk about nerve! If they haven't got it, who has? This trip of these subterranean barbarians, thus flung suddenly into midair, out into a world of which they know absolutely nothing, must be exactly what a journey to Mars would mean to me.
The balloon is said to have described a visible parabola, like the trajectory of a projectile, and fell at Evreux in safety and beyond the range of the enemy's fire, though not far from their lines. This was on the 23rd of September.
An interchange of French profanity tinted the atmosphere for a few moments and then we resumed the trajectory of our flight. We had expected to be welcomed by our hostess; but instead we were informed by the butler that she and the other guests had driven over to watch a polo game and would probably not be back before six.
It is always at one bound that a trajectory is traversed when, on its course, there is no stoppage. The bound may last a few seconds, or it may last for weeks, months, or years, but it is unique and cannot be decomposed. Only, when once the passage has been made, as the path is in space, and space is infinitely divisible, we picture to ourselves the movement itself as infinitely divisible.
But of the flux itself of time, still less of its effect on consciousness, there is here no question; for there enter into the calculation only the points T , T , T , ... taken on the flux, never the flux itself. What we retain of the movement of the mobile T are positions taken on its trajectory.
He reported that at 9:35P.M. he was on a westerly heading, approaching Las Vegas from the east, when he and his co-pilot saw what they first thought was a "shooting star." It was ahead and a little above them. But, the captain said, it took them only a split second to realize that whatever they saw was too low and had too flat a trajectory to be a meteor.
When viewed from certain angles, a meteor can appear to have a flat trajectory. The reason that so many had been seen during December of 1948 and January of 1949 was that the weather had been unusually clear all over the Southwest during this period. Dr. La Paz led the group who believed that the green fireballs were not meteors or meteorites.
Its force of impulsion was prevailing over the lunar attraction, but the trajectory of the projectile was certainly taking them nearer the lunar disc, and it might be hoped that at a nearer point the weight would predominate and provoke a fall. The three friends, having nothing better to do, went on with their observations. They could not, however, yet determine the topography of the satellite.
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