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White dwarf lashes red dwarf with mystery ray

28 July 2016 Astronomy Now

Astronomers have discovered a new type of exotic binary star. In the system AR Scorpii a rapidly spinning white dwarf star powers electrons up to almost the speed of light. These high energy particles release blasts of radiation that lash the companion red dwarf star, and cause the entire system to pulse dramatically every 1.97 minutes with radiation ranging from the ultraviolet to radio.

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Asteroid ripped apart to form star’s glowing ring system

11 November 2015 Astronomy Now

The remains of a fatal interaction between a dead star and its asteroid supper have been observed in detail for the first time. An international team of astronomers used the Very Large Telescope at ESO’s Paranal Observatory in Chile and other observatories to study the shattered remains of an asteroid around a stellar remnant — a white dwarf.

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Exo-asteroid debris shows how water reached Earth

7 May 2015 Astronomy Now

New research strongly suggests that water delivery via asteroids or comets is likely taking place in many other planetary systems, adding further support to the possibility water can be delivered to Earth-like planets via such bodies to create a suitable environment for the formation of life.