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Astronomers Discover the Biggest Radio Jet in the Early Universe

Context: Scientists have found the largest radio jet ever seen in the early universe, coming from a quasar.

About Quasars

  • A quasar (short for “quasi-stellar object”) is an extremely bright and active galaxy with a supermassive black hole at its center.
  • The black hole is surrounded by a huge disk of gas and dust that gets pulled in by gravity.
  • As this material falls toward the black hole, it heats up and emits enormous amounts of energy, making quasars some of the brightest objects in the universe.
  • A single quasar can outshine an entire galaxy with billions of stars. Some quasars are thousands of times brighter than the Milky Way.

Quasars

Powerful Radio Jets (Sometimes Present)

  • Some quasars shoot out jets of charged particles moving at nearly the speed of light.
  • These jets emit radio waves, which scientists can detect with radio telescopes.
What is a Radio Jet?
  • A radio jet is a stream of high-energy particles shooting out from a supermassive black hole at the centre of a galaxy.
  • These jets move at nearly the speed of light and can extend across hundreds of thousands of light-years.
  • They release radio waves, which scientists can detect using radio telescopes.
Why Haven’t We Seen These Jets Before?
  • Scientists expected that radio jets in the early universe would be hidden by the Cosmic Microwave Background (CMB), which is leftover radiation from the Big Bang.
  • This jet is so extreme and bright that it is still visible, even though it’s incredibly far away.

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