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Some 39 40 Three separate images provided by the Hale telescope show the movement of Sedna, the most distant object yet discovered in our solar system. Telescopes of these objects that reside as far as 10 billion lightyears from Earth, were originally thought to be stars. Hale clearly showed that they were actually “quasistellar objects,” a term later abbreviated to quasars. Quasars are peculiar objects that radiate as much energy per second as a thousand or more galaxies, yet they have a diameter about one-millionth that of galaxy.
The massive radio telescope at Arecibo in Puerto Rico can detect the source of extremely distant radio waves. Radio Telescopes: Discovering the Invisible Universe The Arecibo telescope detects the source of radio waves more distant than any other radio telescope. It has scoured the cosmos from within the nearby solar system to within 5 percent of the edge of the universe, 12 billion light-years away. Arecibo studies the properties of planets, stars, comets, and asteroids within the Milky Way, as well as more exotic cosmic entities from the farthest reaches of the universe, such as supernovas and even black holes.
As the size of the array gradually decreases to the smallest spread, when the telescopes are all placed within four-tenths of a mile of the center, scientists achieve a wide-angle view of the overall structure of the object they are observing. By gathering wavelengths from the same distant object in multiple configurations, astronomers can capture a great deal more information. The position of the twenty-seven radio telescopes of New Mexico’s Very Large Array can be adjusted to measure wavelengths from distant objects in multiple configurations.