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  3. Fail:Delta-Doped Charged Coupled Devices (CCD) for Ultra-Violet and Visible Detection.jpg
Fail:Delta-Doped Charged Coupled Devices (CCD) for Ultra-Violet and Visible Detection.jpg
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Original caption: "Delta-Doped Charged Coupled Devices


Delta-Doped Charged Coupled Devices (CCD) for Ultra-Violet and Visible Detection

CCDs allow scientists to study one of the least explored windows of the electromagnetic spectrum - the extreme ultraviolet. Until recently, scientists believed there was little point to exploring this spectral region. They thought that the mixture of hydrogen gas and other less abundant gases, which fill the space between stars and is commonly called the "interstellar medium," would absorb virtually all extreme ultraviolet radiation before it became detectable from Earth. Consequently, this region became known as the "unobservable ultraviolet."

This is where stable ultraviolet CCDs step in for crucial space and ground-based astronomy to detect younger, hotter objects. Because of the high quantum efficiency of these devices, very faint objects can potentially be observed. Stability of the device makes it possible to gather reliable data in space-based astronomy.

Scientists will learn much more about hot white dwarf stars - extremely dense stars that represent a final stage of stellar evolution - and young massive stars that are characterized by outflowing, shock-heated winds. Moreover, they will learn about cataclysmic variable stars, binary star systems in which the mass of one star is transferred to the other, causing dramatic changes in extreme ultraviolet brightness. They may even have a chance to probe the enigmatic cores of distant galaxies."

Taken from:[1] archive copy at the Wayback Machine


Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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Tarikh/WaktuGambar kenitUkuranPenggunaKomen
semasa03:41, 25 Oktober 2013Gambar kenit bagi versi pada 03:41, 25 Oktober 20132,061 × 1,878 (2.46 MB)Soerfmcrop
22:18, 22 Januari 2006Gambar kenit bagi versi pada 22:18, 22 Januari 20063,060 × 2,036 (1.29 MB)HellispOriginal caption: "Delta-Doped Charged Coupled Devices Delta-Doped Charged Coupled Devices (CCD) for Ultra-Violet and Visible Detection CCDs allow scientists to study one of the least explored windows of the electromagnetic spectrum - the extreme ultra

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