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April, 2017: Scientists Discover Biggest Brown Dwarf ever!! 90x Bigger Than Jupiter!!! also: possible rogue planet 100 LY away??
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anomalous planetary body, 100 light-years away:
Is a rogue world wandering 100 light years from Earth? Weird planet-like object baffles astronomers
The peculiar object CFBDSIR J214947.2-040308.9 was first discovered in 2012
It was first believed to be a rogue planet, an object that does not orbit a star
But scientists remain unsure, and say it could also be a low-mass brown dwarf
[link to www.dailymail.co.uk]
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Biggest Brown Dwarf ever!! 90x Bigger Than Jupiter, 750 light years away:
Scientists have identified a record breaking brown dwarf with the ‘purest’ composition that is about 90 times as massive as Jupiter, located 750 light years away in the outermost reaches of our galaxy.
Brown dwarfs are intermediate between planets and fully-fledged stars. Their mass is too small for full nuclear fusion of hydrogen to helium (with a consequent release of energy) to take place, but they are usually significantly more massive than planets.
The object, known as SDSS J0104+1535, is located 750 light years away in the constellation of Pisces, SDSS J0104+1535 is made of gas that is around 250 times purer than the Sun, so consists of more than 99.99 per cent hydrogen and helium.
Estimated to have formed about 10 billion years ago, measurements also suggest it has a mass equivalent to 90 times that of Jupiter, making it the most massive brown dwarf found to date. It was previously not known if brown dwarfs could form from such primordial gas, and the discovery points the way to a larger undiscovered population of extremely pure brown dwarfs from our Galaxy’s ancient past.
[link to indianexpress.com]
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An international team of astronomers has identified a record breaking brown dwarf (a star too small for nuclear fusion) with the 'purest' composition and the highest mass yet known. The object, known as SDSS J0104+1535, is a member of the so-called halo -- the outermost reaches -- of our Galaxy, made up of the most ancient stars. The scientists report the discovery in Monthly Notices of the Royal Astronomical Society.
Brown dwarfs are intermediate between planets and fully-fledged stars. Their mass is too small for full nuclear fusion of hydrogen to helium (with a consequent release of energy) to take place, but they are usually significantly more massive than planets.
Located 750 light years away in the constellation of Pisces, SDSS J0104+1535 is made of gas that is around 250 times purer than the Sun, so consists of more than 99.99% hydrogen and helium. Estimated to have formed about 10 billion years ago, measurements also suggest it has a mass equivalent to 90 times that of Jupiter, making it the most massive brown dwarf found to date.
[link to www.sciencedaily.com (secure)]
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