## Ergosphere

Whirlpools in Spacetime

Black Holes rotate. And as they rotate, they create a current in spacetime. This current is so extreme it creates a region called the ** ergosphere** where nothing, including light, can overcome it. Inside the ergosphere, nothing can stand still. Everything inside this region is dragged along by the spinning spacetime. The event horizon fits inside the ergosphere, and they touch at the poles. So in one sense, black holes are like whirlpools of spacetime. Once inside the ergosphere, you are caught by the current. And after you cross the event horizon, you disappear.

An Oblate Spheroid

The Ergosphere is a sphere that's compressed along the axis of rotation. The equation of the surface is \[ \frac{x^2+y^2}{a^2}+\frac{z^2}{c^2}=1\] for some constants \(a\) and \(c\). (This formula assumes the \(z-\)axis is the axis of rotation.)

Astronomy Sticker in 3 Sizes

In a bustling city bookstore, a dreamer found a sticker depicting a mesmerizing outer space scene. They stuck it on their laptop, unaware of its magic. Each glance at the sticker sent their imagination rocketing through galaxies, igniting a passion for writing. This tiny piece of art didn't just decorate a laptop; it transformed the dreamer's life, inspiring a series of bestselling sci-fi novels that captured the wonder of the cosmos.