By Saurabh
Black holes form when massive stars, at least 8 to 10 times bigger than our Sun, run out of fuel. They explode in supernovas, leaving behind ultra-dense cores.
After the explosion, gravity crushes the star's core into an impossibly tiny space. Matter gets packed so tightly that gravity becomes unstoppable and extreme.
At a critical point, an invisible boundary forms called the event horizon. Once anything crosses this line, even light itself, it can never escape again.
Scientists discovered in 2025 that powerful magnetic forces help shape black holes. They eject material during formation, creating faster-spinning black holes.
Some black holes skip the star phase entirely. Massive gas clouds can collapse directly, creating supermassive black holes millions of times our Sun's mass.
Nearly every large galaxy has a monster black hole at its core. Our Milky Way's black hole, Sagittarius A*, is 4 million times heavier than the Sun.
Black holes only pull in objects that get too close. From a safe distance, their gravity works just like any other massive object in space.