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by Science Source
$38.00
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Our Bella / Canvas t-shirts are made from a 50% cotton / 50% polyester blend and are available in five different sizes. They're stylish, soft, and incredibly comfortable. Machine wash with cold water, and tumble dry on low heat.
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A supermassive black hole is depicted in this artist's concept, surrounded by a swirling disk of material falling onto it. The purplish ball of light... more
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A supermassive black hole is depicted in this artist's concept, surrounded by a swirling disk of material falling onto it. The purplish ball of light above the black hole, a feature called the corona, contains highly energetic particles that generate X-ray light. If you could view the corona with your eyes, it would appear nearly invisible since we can't see its X-ray light. This composite image shows how a shifting corona can create a flare of X-rays around a black hole. The corona gathers inward (left), becoming brighter, before shooting away from the black hole (middle and right). Astronomers don't know why the coronas shift, but they have learned that this process leads to a brightening of X-ray light that can be observed by telescopes. Normally, before a black hole's corona shifts, there is already an effect at work called relativistic boosting. As X-ray light from the corona reflects off the black hole's surrounding disk of material, the X-ray light becomes brightened, as seen on...
$38.00
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