LMR-031 · Dark Universe
Dark Matter
Most of the universe is invisible. We only see its footprints.
§ A first look
§ Depths
Six ways into the same idea — from bedtime story to chalkboard. No order required.
L1 · Crayon
Told like a bedtime story.
For a curious 10-year-old. No jargon. Just a picture in your head.
Swing a bucket of water on a rope over your head. The rope is the only reason the bucket doesn't fly across the room and ruin your day. Now picture a giant bucket spinning in the sky with no rope at all — and somehow it still doesn't fly off. You'd think: there must be an invisible rope. Right? When we look at how stars whip around a galaxy, they're going way too fast. They should sling themselves off into space like kids letting go of a merry-go-round. They don't. So something we cannot see is holding them in. We named it dark matter. Yes, the name is terrible. We know. Astronomers are very good at physics and very bad at branding.
§ Strange but true
- 01There's five times more of it than everything you've ever seen, eaten, touched, or named.
- 02It passes through your body about a billion times a second. Quietly. Without saying a word.
- 03Galaxies should fly apart. They don't. Something invisible is holding them together — and we still don't know what.
§ From the field journal
Dark Matter
"Most of the universe is invisible. We only see its footprints."
— observed, sketched, not yet fully understood.
§ Nearby
Constellations near Dark Matter
→
Galaxy
A herd of a hundred billion stars, held together by gravity and dark matter.
→
Gravity
It's not a pull. It's a slope.
→
CMB
The afterglow of the Big Bang, still arriving 13.8 billion years later.
→
Dark Energy
Something is pushing space apart faster, and we have no idea what.
→
MOND
What if gravity itself is just wrong on huge scales?
→
Axion
A tiny particle that might solve dark matter and another mystery at once.