Whose theory of general relativity predicted the mathematical possibility of black holes?

Inside black holes

Chapter 1

The anatomy of a black hole

Chapter 2

The four cosmic families

Chapter 3

Extreme physics and spaghettification

Chapter 4

Photographing the invisible

YOUR GOAL

Master of Inside black holes

Ch 1 · The anatomy of a black hole
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hue CERN actually made a black hole, but it was smaller than a proton.

Jul 20

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hue Black Hole Anatomy

Past the event horizon, falling right in, no light escapes!

Jul 20

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hue Black holes can be any size, and some even hid inside quasi-stars.

Jul 20

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The glowing cosmic whirlpool

hue Superheated gas and dust swirl around the black hole, glowing brightly before they fall in.

Jul 20

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The infinitely tiny heart

hue At the very center of a black hole lies the singularity, where all matter is crushed into zero volume.

Jul 20

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My Little Black Hole
BETA

hue Sort black holes by size to discover how massive Sagittarius A* really is.

Jul 20

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Fun Fact

Gravitational lensing: Black holes bend light like a cosmic magnifying glass, warping the image of stars behind them.

Jul 20

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Glossary
event horizon (noun)
The boundary surrounding a black hole from which no matter or radiation can escape. In 2022, the Event Horizon Telescope captured the first direct image of this boundary around Sagittarius A.

Jul 20

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Gossip

Which black hole feature is the most terrifying?

Jul 20

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Quiz

At what speed would an object need to travel to escape a black hole once inside the event horizon?

Jul 20

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hue The glowing cosmic whirlpool

Jul 20

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Quiz

What is the infinitely dense point at the center of a black hole called?

Jul 20

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hue The infinitely tiny heart

Jul 20

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Quiz

What is the photon sphere of a black hole made of?

Jul 20

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hue The point of no return

Jul 20

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Quiz

What optical effect occurs when a black hole's gravity bends light from stars behind it?

Jul 20

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hue The bending ring of light

Jul 20

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Quiz

Whose theory of general relativity predicted the mathematical possibility of black holes?

Jul 20

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Quiz

What causes the accretion disk around a black hole to glow so brightly?

Jul 20

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Quiz

What type of radiation is primarily emitted by the superheated matter in a black hole's accretion disk?

Jul 20