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ALMA witnesses the birth of a triple-star system

28 October 2016 Astronomy Now

A rare triple-star system surrounded by a disc with a spiral structure has been discovered by a global team of researchers. Recent observations from the Atacama Large Millimetre / submillimetre Array (ALMA) resulted in the discovery, lending support for evidence of disc fragmentation — a process leading to the formation of young binary and multiple star systems.

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Oldest known planet-forming circumstellar disc discovered

22 October 2016 Astronomy Now

A group of citizen scientists and professional astronomers joined forces to discover an unusual hunting ground for exoplanets. They found a red dwarf, called AWI0005x3s, surrounded by the oldest known circumstellar disc — a 45-million-year-old primordial ring of gas and dust orbiting the star from which planets can form.

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Hubble finds that nearest quasar is powered by binary black hole

28 August 2015 Astronomy Now

Astronomers using NASA’s Hubble Space Telescope have found that Markarian 231, the nearest galaxy to Earth that hosts a quasar, is powered by two central black holes. The finding suggests that quasars — the brilliant cores of active galaxies — may commonly host two central supermassive black holes that fall into orbit about one another as a result of galactic mergers.