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In a minute they had both of the F-94's and the unidentified target on their scope. The ground controller called the second F-94 and began to vector him into the target. The first F-94 returned to its base. As both the second F-94 and the target approached the radar site, the operator again switched to short range and again he lost the jet and the target.

That the planetary orbits are not circular, but elliptical, the sun occupying one focus of the ellipses. That the speed of planetary motion varies in different parts of the orbit in such a way that an imaginary line drawn from the sun to the planet that is to say, the radius vector of the planet's orbit always sweeps the same area in a given time. These two laws Kepler published as early as 1609.

They concerned the error of the radius vector. Adams could have answered them with perfect ease; but sad to say, though a brilliant mathematician, he was not a man of business. He did not answer Professor Airy's letter.

For Van Rycke to leave the Queen that was as unthinkable as if Captain Jellico had suddenly announced that he was about to retire and become a kelp farmer. "Just for the one trip," the Cargo-master hastened to assure them. "I smooth their vector with the storm priests and hand over so the Eysies will be frozen out " Captain Jellico interrupted at that point.

He then ascertained the dimensions of the orbit; and, by a comparison of the times employed by the planet to complete a whole revolution or any part of one, he discovered that the time in which Mars describes any arches of his elliptic orbit, were always to one another as the areas contained by lines drawn from the focus or the centre of the sun to the extremities of the respective arches; or, in other words, that the radius vector, or the line joining the Sun and Mars described equal areas in equal times.

The master sergeant who was operating the radar called the F-51's on the radio, got them together and started to vector them toward the target. As the two airplanes climbed they kept up a continual conversation with the radar operator to make sure they were all after the same thing.

He dialed the long distance operator and said the magic words, "This is Foxtrot Kilo Three Dash Zero Blue." Seconds later he was talking to the duty sergeant at the Columbus Filter Center. A few more seconds and the sergeant had his story. Another jet was scrambled and this time Stringfield, via a radiotelephone hookup to the airplane, gave the pilot a vector.

Airy wrote expressing his interest, and asked for particulars about the radius vector. Adams did not then reply, as the answer to this question could be seen to be satisfactory by looking at the data already supplied. He was a most unassuming man, and would not push himself forward.

I, Captain Corrondao Klorantel, am in command of the Stellar Guard Cruiser Myloren, number P-4730. I am assigned to duty with the 334th Vector, which is operating in Sector Nine. The Myloren was on routine patrol in the Fourth Increment at 261.0203, when a message was received from Sector Headquarters, giving co-ordinates on Planet 3-G3-9/4871, with a request for emergency condensation.

It has arrived so promptly on time following its elliptical course, at such a rate that the radius vector, a line from the sun to the earth, passes over equal areas in equal times, furnishing every moment an abtruse problem difficult for a scholar to solve. The orbit is so vast that it varies from a straight line, but 4 in. in 666 mi., the distance from Philadelphia to Chicago.