“While the ‘USS Jellyfish’ defies easy classification, we here propose that the phenomenon is caused by the reacceleration and compression of multiple aged electron populations from historic active galactic nucleus .”In this case, the scientists say, there are no active galactic nuclei anywhere nearby, but the space jellyfish is likely the remnant of one—the scientists believe the jellyfish to be 2 billion years old.
Many objects in space throw off radio waves, and scientists working at huge telescopes like Murchison Widefield Array try to identify where different wave signatures are coming from. That’s where Hodgson first spotted what he thought was a data error in 2017.reports the gigantic phenomenon lives in a very specific, very low frequency of radio bandwidth that rendered it almost invisible unless scientists knew where to look.
The space jellyfish is much, much “steeper,” the scientists say, than anything else they’ve ever found. “To be so steep, the source either has to be exceptionally old, except then it should have faded from simply expanding into space; or triggered by a shock that is exceptionally weak, except then it shouldn’t be so bright!” Hodgson toldJellyfish
after figuring out what kind of radio signature to look for, but the more they look, the more rare the space jellyfish turns out to be. How can this astonishing object also be so singular in the observed universe so far? That’s still a very big mystery.
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