Scientists have long searched for proof of the decades-old theory that black holes surround the supermassive black hole at the heart of our galaxy. By tweaking their approach just a little, astronomers have now turned up the first direct evidence that they do in fact exist.
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Black holes can be anywhere from a few times the mass of the Sun up to millions of times that, but some even bigger than that. A new study of data gathered by NASA’s Chandra X-ray telescope has found these so-called “ultramassive” black holes may be larger and more common than we thought.
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Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) observatory in Chile have imaged a very active black hole at the center of spiral galaxy M77, which is apparently feasting on the universe’s largest donut.
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Gamma ray bursts are mysterious signals blasting in from the deepest reaches of space, and we still don’t have much of an idea about what causes them. In order to help unlock the secrets, researchers have managed to recreate mini gamma ray bursts in the lab for the first time.
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An international team of astronomers has found that a strange repeating fast radio burst is even odder than previously thought. The radio waves from FRB 121102 are being “twisted” to an extreme degree, indicating that highly-magnetized plasma could be interfering.
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With intense gravity and radiation, the region around the supermassive black hole at the center of the galaxy was thought to be too harsh for star formation. But now almost a dozen young rebellious stars have been spotted there anyway, triggering a rethink of our understanding of how stars are born.
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The precise instruments at the LIGO and Virgo facilities were responsible for past detections of gravitational waves, but now astronomers plan to look for ripples from supermassive black hole collisions using natural detectors in space: pulsars, the “cosmic lighthouses” of the sky.
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Using the most powerful X-ray-generating machine on the planet, researchers have reproduced what happens to matter just before it is devoured by a black hole. Their findings show that a long-standing theory regarding the giant gravitational sinkholes may be completely wrong.
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The world’s most powerful x-ray laser is designed to help scientists learn about the microscopic world in more detail. In the past the instrument has been used to create a mini-star, and now it's made a “molecular black hole”, by concentrating the full intensity of the beam onto a single atom.
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For the first time, astronomers have witnessed a star disappear before their eyes. It appears to have collapsed into a black hole without the usual supernova, marking the first time scientists have witnessed the birth of a black hole, and changing our understanding of the life and death of stars.
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