United States or Australia ? Vote for the TOP Country of the Week !
The next is to obtain as much material as we can on the 21-centimeter wave length. After that we will shift to other wave lengths to see if the source is emitting. Dr. Farid will make assignments." Farid stood up. "A radio-teletype circuit will be installed at once. Work is already in progress in the city, and we should have installation crews here within an hour or two.
It is certain, however, the Germans brought against Namur their 28-centimeter guns, and probably some of 21-centimeter caliber. These artillery weapons were quite formidable enough to reduce the Namur forts. The former threw a shell of 750 pounds from a range of three miles beyond the reach of the Namur guns. The latter projected shells of 250 pounds.
The Signal Vanishes Rick studied the Sanborn tracing. He could see where the pulsed signals gradually disappeared into a much stronger, steady 21-centimeter signal. "We lost it at 4:02 yesterday," Winston said. "It hasn't reappeared. Apparently the signal source moved into, or behind, a globular cluster." Rick's brows knit. "That's more evidence that it was moving contrary to normal direction?"
I'm no expert, but I think I got the drift. To start with, the most common thing in space is hydrogen gas. It gives off energy that can be detected on the 21-centimeter wave length. This is important to the radio astronomers, because they can use their telescopes to figure out how hydrogen is distributed throughout the universe." "I'm with you," Scotty said.
He spoke English, but wasn't much of a conversationalist. After a while the boys forgot he was there. Listening to the space signal was strange. As the tape ran through, Rick was certain his ear detected a kind of pattern in the sounds. There was a continuous hiss; that was normal hydrogen on the 21-centimeter wave length.
"You will note that these peaks occur at intervals, with the spacing apparently random. The main sequence of noise out of which the peaks rise is the 21-centimeter hydrogen line. Notice also that the peaks have nearly identical amplitudes. Obviously, the source is neutral hydrogen, which is to say hydrogen in its normal form, not ionized as we find it in plasma in a star's atmosphere.
The Germans are said to have employed thirty-two of the heavier caliber guns, and a large number of 21-centimeter. Thus Namur was doomed before the bombardment commenced. Von Bülow's left wing advanced up the Meuse north bank from Huy, some part of it crossing to the south bank at Ardenne, where it came in touch with the Saxon army.
Word Of The Day