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.
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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.
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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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