Moon-forming disk discovered around distant planet

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Using Earth's most powerful array of radio telescopes, astronomers have made the first observations of a circumplanetary disk of gas and dust like the one that is believed to have birthed the moons of Jupiter.
via Science Daily
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Hubble uncovers black hole that shouldn't exist

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As if black holes weren't mysterious enough, astronomers have found an unexpected thin disk of material furiously whirling around a supermassive black hole at the heart of the magnificent spiral galaxy NGC 3147, located 130 million light-years away.
via Science Daily
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Alternating currents cause Jupiter's aurora

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An international research team has measured the system of currents that generates Jupiter's aurora. The scientists found out that sulphur dioxide gas from the gas giant's Moon Io is the cause of the system of currents.
via Science Daily
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