This is Scientific Americans 60 Second Science.

I'm Lee Billings.

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Astronomers have discovered the most luminous galaxy ever found,

shining with the equivalence of 300 trillion suns from the far side of the visible universe.

But almost all of that light is being produced by the galaxy's central, supermassive black hole, not by its stars.

The enlightening finding is into Astrophysical Journal.

Black holes are black because light itself cannot escape once falling in.

But a feeding black hole is surrounded by a whirling white hot disk of glowing debris, material heated to millions of degrees as it spirals down to oblivion.

The black hole in this faraway galaxy is on a feeding frenzy.

The activity produces enough light to warm up most of the galaxy's

dust, which gives the whole galaxy an infrared glow that we can detect from more than 12.5 billion

light years away. Considering we are seeing this giant black

hole's activity from a time when the universe was only a tenth of its present age,

astronomers are puzzled about how it could have grown so big and bright so fast.

A young hungry black hole usually takes an occasional break from feeding.

Its glowing debris disk can get so intense it pushes incoming material further away.

Think of a baby, burping mid-meal. But this particular

galaxy's black hole seems to have circumvented this limitation. If it's burping, the burps seem to be few and

far between. One theory is that it must be spinning very slowly.

The slower a black hole spins, the weaker its repulsive burps may be and the longer

it can gorge uninterrupted.

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