Strange gamma-ray heartbeat puzzles scientists (IMAGE)
Caption
The microquasar SS 433 (background) sways with a period of 162 days. The inconspicuous gas cloud Fermi J1913+0515 (foreground), about 100 light years away, pulsates with the same rhythm in gamma rays, suggesting a direct connection. But how exactly the microquasar drives this 'heartbeat' of the gas cloud is still puzzling.
Credit
Credit: DESY, Science Communication Lab
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