yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Black Holes 101 | National Geographic


2m read
·Nov 11, 2024

(Mysterious music)

[Woman] Black holes are among the most fascinating objects in our universe, and also the most mysterious. A black hole is a region in space where the force of gravity is so strong, not even light, the fastest known entity in our universe, can escape. The boundary of a black hole is called the event horizon, a point of no return, beyond which we truly cannot see.

When something crosses the event horizon, it collapses into the black hole's singularity, an infinitely small, infinitely dense point where space, time, and the laws of physics no longer apply. Scientists have theorized several different types of black holes, with stellar and supermassive black holes being the most common. Stellar black holes form when massive stars die and collapse.

They're roughly 10 to 20 times the mass of our sun, and scattered throughout the universe. There could be millions of these stellar black holes in the Milky Way alone. Supermassive black holes are giants by comparison, measuring millions, even billions of times more massive than our sun. Scientists can only guess how they form, but we do know they exist at the center of just about every large galaxy, including our own.

Sagittarius A, the supermassive black hole at the center of the Milky Way, has a mass of roughly four million suns and has a diameter about the distance between the earth and our sun. Because black holes are invisible, the only way for scientists to detect and study them is to observe their effect on nearby matter.

This includes accretion disks, a disk of particles that form when gases and dust fall toward a black hole, and quasars, jets of particles that blast out of supermassive black holes. Black holes remained largely unknown until the 20th century. In 1916, using Einstein's general theory of relativity, a German physicist named Karl Schwarzschild calculated that any mass can become a black hole if it were compressed tightly enough.

But it wasn't until 1971 when theory became reality. Astronomers studying the constellation Cygnus discovered the first black hole. An untold number of black holes are scattered throughout the universe, constantly warping space and time, altering entire galaxies, and endlessly inspiring both scientists and our collective imagination.

More Articles

View All
Warren Buffett: The Upcoming Stock Market Crash (Warren Buffett Indicator)
It’s no secret that stock prices are at all-time highs. This has people asking the literally trillion-dollar question: Are we in a stock market bubble? According to what is referred to as the Warren Buffett indicator, the answer to that question is a reso…
Starbucks Stock: Are Silly Incentives Burning Shareholders? (w/ @HamishHodder)
[Music] Hey guys, welcome back to the channel. We’re continuing on with the new money advent calendar for yet another episode and yet another collaboration. This time I’ve got someone that you guys would be very familiar with, and that is of course Hamis…
GET PAID TO INVEST IN OIL | Infinite Money Explained
What’s up you guys? It’s Crime here! So, I think we just unlocked the brand-new infinite money glitch because, as of yesterday, April 20th, the price of oil futures went negative. Which means it dropped below zero dollars! That’s right, below zero dollars…
The Simple Secret of Runway Digits
While waiting on a plane during taxi ‘till takeoff, looking out the window, you may have noticed the giant number numbering the runway, say eight, which implies seven others exist, at least, but this is a flight out of L.O.L. Airport, in Nevada’s desert o…
SPOOKED DOG! And More ... IMG! #29
A mouse on a cat on a dog and chocolate sprinkles. It’s episode 29 of [Music]. IMG trick people into thinking you have a six-pack or throw your crumbled up bad ideas into the blinds to make a skull. Then swim with an ape and Spot the Difference. There’s …
This world is a mess… and Nietzsche saw it coming.
The infamous philosopher Friedrich Nietzsche famously proclaimed, “God is dead. God remains dead. And we have killed him,” a statement that would become one of his most memorable quotes. These words point to the religious decline that existed during Nietz…