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Multiple images of a distant quasar are visible in this combined view from NASA’s Chandra X-ray Observatory and the Hubble Space Telescope. The Chandra data, along with data from ESA’s XMM-Newton, were used to directly measure the spin of the supermassive black hole powering this quasar.

Theoretical physics: The origins of space and time Many researchers believe that physics will not be complete until it can explain not just the behaviour of space and time, but where these entities come from.

Aurora spotted on Jupiter as Juno probe nears

Best known for its Giant Red Spot, now Jupiter has another stunning decoration: An aurora at the top of the solar system's largest planet.

What holiday lights look like from space.

Phil Plait on

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