,
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KISSIMMEE,
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, Fla.— Supermassive black holes are a lot like toddlers. They’re energetic,
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, often the center of attention — and occasionally spit up their food. A black hole at the core of another galaxy has belched twice in the last 6 million years,
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, leaving a record of these eruptions drifting through intergalactic space.
Two arcs of X-ray light hovering next to galaxy NGC 5195 are the hot remnants of two eruptions from a supermassive black hole at its center,
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, astronomer Eric Schlegel reported January 5 at a meeting of the American Astronomical Society. The arcs are about 3,
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,000 light-years apart and several thousand light-years long.?
Gaga for gravity waves
With a single chirp,
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, scientists confirmed the existence of gravitational waves created by the collision of two black holes. Science News’ special report (SN: 3/5/16) and subsequent stories in the March 19 issue sparked a flurry of reader questions on the physics of gravitational waves,
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.
Reader Peter Toot wondered if gravitational waves’ ability to

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