Birth Echo: How Astronomers Found Evidence of a Black Hole ⚡ экспресс
Next to the microquasar SS 433 — a system hosting a stellar-mass black hole — astronomers have spotted an X-ray shell tied to radio emission and a cloud of neutral hydrogen. Its spectrum reveals weakly ionized plasma (gas with some electrons stripped away) at about 1 keV, suggesting it's the leftover bubble from a supernova that blew up 20–30 thousand years ago. For the first time, this directly confirms that some black holes really do emerge from such cataclysmic explosions, and the progenitor in SS 433 was a star weighing more than 25 Suns.
The life of massive stars ends in a colossal explosion — a supernova. Afterward, a black hole may remain, but direct evidence of this scenario has long been missing. Now astronomers have spotted a shell of hot gas around the black hole SS 433 — like a ring of steam over a gigantic cup of coffee. Spectral analysis shows this 'steam' is only 20,000–30,000 years old, a cosmic blink. The gas composition and a nearby cloud of cold hydrogen confirm: it was ejected by the explosion, not by the black hole's jets. A surprise: the black hole is now devouring material from its own cooling shell — it's feeding on the 'ashes' of its birth. The progenitor was over 25 times the mass of the Sun. Such discoveries help clarify which stars turn into black holes and explain the origin of high-energy particles bombarding Earth.
🎯 The light from the explosion traveled 18,000 years to reach us: it could have been seen by Stone Age people when mammoths still roamed the Earth.