The Cosmic Race Between Stars and Black Holes

<p>Over the full cosmic history of the past 13.8 billion years after the Big Bang, supermassive black holes and stars produced roughly the same amount of energy output. Since both engines feed on gas, this suggests that their growth inside galaxies was self-regulated by their output. Indeed, we know that massive stars generate powerful winds and explode as supernovae that can eject the surrounding gas from their host galaxy. Similarly, accreting black holes generate winds and radiation that can push out and heat surrounding gas. Both engines remove the gas that fuels them, just like babies that become energetic after eating too much and push the food off the table after gaining enough calories.</p> <p><a href="https://avi-loeb.medium.com/the-cosmic-race-between-stars-and-black-holes-ce3ddc9bb47a"><strong>Read More</strong></a></p>