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A lonely planet and its distant star

26 January 2016 Astronomy Now

A team of astronomers in the UK, USA and Australia have found a planet, until now thought to be a free floating, in a huge, 900,000-year orbit around its star. Incredibly the object, designated as 2MASS J2126, is about 1 trillion (1 million million) kilometres from the star, or about 7,000 times the distance from the Earth to the Sun.

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“Failed stars” host powerful auroral displays

30 July 2015 Astronomy Now

Brown dwarfs are relatively cool, dim objects that are too massive to be planets, yet they are too small to sustain hydrogen fusion reactions. By observing a brown dwarf 20 light-years away, researchers have found another feature that makes these so-called failed stars more like supersized planets — they host powerful aurorae near their magnetic poles.