Attention to the Unseen

An artist’s illustration of a black hole “eating” a star. NASA/JPL-Caltech By Eileen Meyer, University of Maryland, Baltimore County Earlier this year, astronomers stumbled upon a fascinating finding: Thousands of black holes likely exist near the center of our galaxy. The X-ray images that enabled this discovery weren’t from some state-of-the-art new telescope. Nor were they even recently taken – some of the data was collected nearly 20 years ago. No, the researchers discovered the black holes by digging through…

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Reuters reports: Astronomers have detected the early stages of a colossal cosmic collision, observing a pile-up of 14 galaxies 90 percent of the way across the observable universe in a discovery that upends assumptions about the early history of the cosmos. Researchers said on Wednesday the galactic mega-merger observed 12.4 billion light-years away from Earth occurred 1.4 billion years after the Big Bang that gave rise to the universe. Astronomers call the object a galactic protocluster, a precursor to the…

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Gaia’s view of our Milky Way and neighbouring galaxies. ESA/Gaia/DPAC, CC BY-SA By George Seabroke, UCL Most of us have looked up at the night sky and wondered how far away the stars are or in what direction they are moving. The truth is, scientists don’t know the exact positions or velocities of the vast majority of the stars in the Milky Way. But now a new tranche of data from the European Space Agency’s Gaia satellite, aiming to map…

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In memory of Stephen Hawking, who died on Wednesday at 76, the New York Times has gathered a selection of his quotes: “Remember to look up at the stars and not down at your feet. Try to make sense of what you see and wonder about what makes the universe exist. Be curious. And however difficult life may seem, there is always something you can do and succeed at.” Don’t miss the latest posts at Attention to the Unseen: Sign…

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