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But some theorists believe that when it is possible, they will be able to determine how a particular object formed by comparing its spectrum with that of its parent star to determine the relative proportions of heavy elements in the two bodies.
ECONOMIST: Twinkle, twinkle, giant planet
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Kissinger's first-hand experiences of those pivotal moments during the Cold War make him an object of fascination for people across the political spectrum.
BBC: Why Julian Assange would target Henry Kissinger
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Edison bulbs function by making a Tungsten filament very hot, and a hot object glows: radiating energy on a broad spectrum of wavelengths, only a small part of which is visible to the eye.
FORBES: LED Light Bulbs Mature At Last