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7 articles
Two galaxies slam together, and billions of years of quiet come to a screeching end. Here's how cosmic pile-ups funnel gas straight into a supermassive black hole's waiting mouth — and which colliding pairs you can actually spot from your backyard.
Some quasars blaze to life in perfect company while their galactic neighbors snooze through the show. We unpack the gravitational choreography, gas-delivery schedules, and cosmic web geography behind quasar 'twinning' — and why it matters for understanding how the universe built its biggest structures.
Quasars flicker, and that flicker turns out to be one of the most useful signals in astronomy. Here's how scientists are turning these black-hole-powered beacons into rulers, stopwatches, and time machines — all at once.
The first 100 million years of cosmic history left almost no witnesses—almost. Here's how astronomers use ancient light, microwave whispers, and JWST's golden eye to reconstruct the universe when it was less than 1% of its current age.
Some black holes devour a sun's worth of matter every few days. Others sit dormant for millions of years, snacking on nothing. Here's why the universe's biggest eaters have such wildly different appetites.
Astronomers can't hold a ruler up to the universe, so they've borrowed a trick from stage lighting: shine a brilliant beam through the fog and read what it hits. Here's how quasar absorption spectroscopy turned the brightest objects in existence into the universe's most useful measuring tapes.
Quasars can pump out more light than a trillion suns — and the wildest part is what's doing the shining. Here's how feeding supermassive black holes became the brightest beacons in the cosmos, plus how you can spot one from your own backyard.