NASA Uses Drawing by Iranian Artist to Illustrate Black Holes and Quasars
Science and Culture News Blog, Kodoom.com
The official site of U.S. National Aeronautics and Space Administration (NASA) has used artwork by Iranian American artist Nima Abkenar to illustrate a quasar, a type of active galactic nucleus, surrounded by a dusty donut shape (torus) and clumps called “clouds.” These clouds start small but can expand to be more than 1 parsec (3.3 light-years) wide.
According to the article:
"Once you leave the majestic skies of Earth, the word “cloud” no longer means a white fluffy-looking structure that produces rain. Instead, clouds in the greater universe are clumpy areas of greater density than their surroundings.
Space telescopes have observed these cosmic clouds in the vicinity of supermassive black holes, those mysterious dense objects from which no light can escape, with masses equivalent to more than 100,000 Suns. There is a supermassive black hole in the center of nearly every galaxy, and it is called an “active galactic nucleus” (AGN) if it is gobbling up a lot of gas and dust from its surroundings. The brightest kind of AGN is called a "quasar." While the black hole itself cannot be seen, its vicinity shines extremely bright as matter gets torn apart close to its event horizon, its point of no return.
But black holes aren’t truly like vacuum cleaners; they don’t just suck up everything that gets too close. While some material around a black hole will fall directly in, never to be seen again, some of the nearby gas will be flung outward, creating a shell that expands over thousands of years. That’s because the area near the event horizon is extremely energetic; the high-energy radiation from fast-moving particles around the black hole can eject a significant amount of gas into the vastness of space."
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»This is a summary of the original feature in Farsi. To request a more extensive translation of the Farsi text, please contact us.
