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our milky way central black hole has a

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leak this supermassive black hole over

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four million times more massive than our

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sun

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looks like it still has the remnants of

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a blow torch like jet dating back

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several thousand years nasa's hubble

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space telescope hasn't photographed the

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phantom jet yet but it has helped find

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circumstantial evidence that the jet is

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still pushing feebly into a huge

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hydrogen cloud

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this is further evidence that the black

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hole is not a sleeping monster but

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periodically hiccups as stars and gas

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clouds fall into it

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the hiccup results in superheated

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material blasting away from the black

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hole as narrow beams or jets shooting in

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the same direction as the black hole's

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spin axis along with a flood of ionizing

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radiation

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as the jet blows through the gas it hits

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material which creates a series of

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expanding bubbles that extend out to at

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least 500 light years

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the streams continued to percolate out

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of the milky way's dense gas disc into

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the galactic halo

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scientists concluded that the black hole

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clearly surged in brightness as much as

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1 million fold in the last million years

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that would be enough for a jet to punch

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into the halo of material that surrounds

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the galaxy

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this hubble image of galaxy ngc 1068

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previous observations by hubble and

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other telescopes found evidence that the

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milky way's black hole had an outburst

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about two to four million years ago that

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was energetic enough to create an

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immense pair of bubbles towering above

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our galaxy that glow in gamma rays

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hubble was used to see how fast the

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bubbles were expanding and what they

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were made of

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hubble later found that the burst was so

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powerful that it lit up a gaseous

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structure as far away as 200 000 light

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years from the galactic center

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called the magellanic stream seen here

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in pink this gas is still glowing from

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that event even today

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the residual jet feature is close enough

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to the black hole that it would become

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much more prominent only a few decades

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after the milky way's black hole powers

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up again

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whenever that does actually end up