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Astronomers at the ESO (the European Southern Observatory) have announced an astonishingly unusual find: A pair of double stars, dubbed VFTS 352, roughly 160,000 light years away in the Tarantula Nebula. The Tarantula Nebula already holds multiple records — information technology'southward the most active starburst region in the Local Group of galaxies (meaning information technology is churning out new stars at a very loftier rate), and information technology'southward already then brilliant, it would cast shadows on Earth if it were as close to us every bit the Orion Nebula (a stone's throw away, at just ane,344 light years). Even given these feats, a double star stands out.

You've probably heard of binary or even trinary star systems, in which multiple stars orbit each other in a stable configuration. In some cases, binary stars orbit close enough to each other that their gaseous envelopes affect, in what is sometimes called a contact binary. This configuration, in contrast, is what astronomers telephone call an "overcontact binary," and what the rest of the world refers to every bit a "stellar strapless bra."

A really big strapless bra. With surface temperatures that exceed 40,000C, a combined mass 57 times larger than our dominicus, and each crazily rotating around the…

Ok, we're going to need to drop the metaphor at this bespeak. Merely imagine two hyperactive, unstable stars that are separated by a mere eyeblink (in stellar terms, 12 million kilometers ain't squat). Each is classified as an O-type star — and O-type stars are the rarest main sequence stars in the universe, comprising just 0.00003% of known stars. They're extremely prone to going supernova and collapsing into black holes or neutron stars. Finding two of them 12 million kilometers apart and actively merging, therefore, is something of a treat.

Morgan-Keenan_spectral_classification

That'southward an O-type star in comparison to the other main sequence stars. Our dominicus, in dissimilarity, is a 1000-type main sequence star.

Right now, the stars of VFTS 352 are estimated to be sharing roughly 30% of their total mass between each other. No other overcontact binary is known to be this large or to share that great a percentage of its mass. Co-ordinate to the ESO, "The VFTS 352 is the best example withal constitute for a hot and massive double star that may show this kind of internal mixing," explains lead author Leonardo A. Almeida of the University of São Paulo, Brazil. "Equally such information technology's a fascinating and important discovery."

Right now, astronomers are predicting the star volition die in one of two ways. Either the two stars will merge, forming a single giant and insanely unstable O-type star (possibly a hypergiant) before collapsing into a long-duration gamma ray outburst (and incidentally, likely sterilizing every single planet within a not-piffling distance). Option #ii is explained by Selma de Mink of University of Amsterdam: "If the stars are mixed well enough, they both remain compact and the VFTS 352 system may avoid merging. This would atomic number 82 the objects downward a new evolutionary path that is completely dissimilar from archetype stellar evolution predictions. In the case of VFTS 352, the components would likely terminate their lives in supernova explosions, forming a close binary system of blackness holes. Such a remarkable object would exist an intense source of gravitational waves."

Be glad our corner of the Milky Way is relatively dull. Remarkable objects like VFTS 352 are capable of causing extinction events across galactic distances. As Wikipedia notes: " GRB [Gamma Ray Burst] 080319B, for instance, was accompanied by an optical counterpart that peaked at a visible magnitude of 5.eight,comparable to that of the dimmest naked-eye stars despite the burst's distance of 7.5 billion light years. Assuming the gamma-ray explosion to be spherical, the free energy output of GRB 080319B would be within a factor of two of the rest-mass energy of the Dominicus (the energy which would be released were the Lord's day to be converted entirely into radiation).

Exist back later. I demand to stock upwards on sunscreen.