What is a black hole?

 A black hole is a region in space where gravity is so strong that nothing — not even light — can escape from it.

🕳️ What makes a black hole?

Black holes form when a massive star collapses under its own gravity after it runs out of fuel. If the core is heavy enough, it gets crushed into an incredibly dense point called a singularity, surrounded by a boundary called the event horizon — the "point of no return."

🧲 Key features:

• Feature What it means
• Singularity A point of infinite density at the center. Physics breaks down here.
• Event Horizon The invisible "surface" around a black hole — once you cross it, you can't escape.
• Accretion Disk A glowing disk of gas and dust spiraling into the black hole. It heats up and emits radiation.
• Spaghettification Extreme gravity near a black hole can stretch objects like spaghetti due to tidal forces.

🌌 Example: Sagittarius A*

• This is the supermassive black hole at the center of our Milky Way galaxy.
• It's about 4 million times the mass of the Sun.
• In 2022, astronomers captured its image using the Event Horizon Telescope — a huge milestone in astrophysics!

🎥 Real-world visualization:

You might have seen a black hole in the movie "Interstellar" — that was based on real physics, and even helped scientists model how light bends near black holes.

🧠 In simple terms:

A black hole is like a cosmic trapdoor — anything that falls in, including light, can’t get out. But we can "see" them by how they affect nearby stars and gas.