Astronomers Have Discovered a Black Hole Jet That Is 50 Times Larger Than Its Galaxy

Astronomers at Western Sydney University have discovered one of the biggest black hole jets in the sky.

, the immense size and relative closeness of NGC2663 make these some of the biggest known jets in the sky.So, what did we see, when the precision and power of ASKAP got a"close-up" view of an extragalactic jet?

This process is analogous to an effect seen in jet engines. As the exhaust plume blasts through the atmosphere, it is pushed from the sides by the ambient pressure. This causes the jet to expand and contract, pulsing as it travels. Black hole jets from NGC2663 compared to a jet engine. Top image: observations from the ASKAP radio telescope. Bottom: a methane rocket successfully being tested in the Mojave Desert. Note the patterns of compression. As well as in jet engines, shock diamonds have been seen in smaller, galaxy-sized jets. We've seen jets slam into dense clouds of gas, lighting them up as they bore through. But jets being constricted from the sides is a more subtle effect, making it harder to observe.

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