Word: transmiting
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Dates: during 1980-1989
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...that students could listen to a professor and immediately test their comprehension of the material by working through a series of questions and problems presented by an appropriate computer program. Science concentrators could simulate many laboratory experiments on computers without leaving their residence hall. Video technology could not only transmit lectures but bring the resources of the outside world to students in living color. For example, are history majors could use a videodisc linked with a computer to explore the great museums they chose for as long as they wished, and summon up text to explain the picture...
...spectacular," said Ellis Miner, Voyager's deputy project scientist. "What has remained unseen to this point is going to turn out even better." For as it swung past Uranus, Voyager took thousands of pictures and gathered reams of scientific data, accumulating information faster than its systems could process and transmit it toward the earth. The unsent information, stored on magnetic tape, was to be gradually beamed to J.P.L. over the next several days. In these transmissions, scientists expected to find, among other things, images of more tiny moons...
...complexes in California, Australia and Spain, and combined them electronically. Still, the combined signals were so weak that NASA engineers had to slow down the transmission rate so that information could be distinguished from normal radio background noise. As a result, it took Voyager at least four minutes to transmit a single picture. Then too, the images picked up by the spacecraft's cameras were extraordinarily dim; the sunlight reaching Uranus is only about 1/400th as intense as it is on earth. But computer...
...Keck telescope, as it will be called, is the first of a new generation of extra-large telescopes designed to overcome construction problems that have dogged sky gazers since before the Hale was dedicated in 1948. Photons (massless particles that transmit light) from an ancient galaxy may travel billions of light years through space before they speed down a telescope tube. But unless enough of them are collected, astronomers will not be able to see the galaxy's image. Gathering sufficient photons to register an image is accomplished by either taking long-exposure photographs or using a larger mirror system...
Through Keck, the space telescope and other new devices, astronomers hope to get a closer look at a myriad of cosmic quandaries: quasars; pulsars, the spinning neutron stars that transmit precisely spaced radio pulses; and the dusty smudges around some stars, which could be the beginnings of planetary systems much like the sun's. And because light from space, traveling at 186,000 miles a second, takes time to reach the earth, the deeper into space astronomers can probe, the farther back into the past they can see. Says Schmidt: "By looking farther out in the universe, you are paging...