LMR-002 · Light
Light
You're reading messages that left stars before humans existed.
§ 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.
Light is the stuff that lets you see. The Sun, your lamp, that obnoxiously bright fridge bulb at 2 a.m. — they all spray out zippy little specks. The specks bounce off your walls and your dog and zoom into your eyes, and your brain quietly assembles the bouncing into 'oh, dog.' These specks are the fastest thing in the universe. Nothing beats them, not even a teenager being told to come to dinner. Light is so fast that a beam from a faraway star left a long, long time ago and is only finishing the trip tonight. When you look at the night sky, you're not seeing what's there. You're seeing what was there. The sky is old mail. Some of it is so old the sender doesn't exist anymore.
§ Strange but true
- 01Every photo of a galaxy is a letter that took millions of years to arrive. You read mail from the dead.
- 02Light has no clock. From a photon's point of view, the entire journey across the universe takes zero time.
- 03Your eyes only see one octave of a piano that's a hundred keys wide. The universe is mostly glowing in colors you'll never know.
§ From the field journal
Light
"You're reading messages that left stars before humans existed."
— observed, sketched, not yet fully understood.
§ Nearby
Constellations near Light
→
Redshift
The universe is stretching, and dragging every wavelength of light with it.
→
Spectrum
The rainbow keeps going in both directions, forever.
→
Photon
A massless messenger that always travels at the universe's speed limit.
→
JWST
A telescope tuned to see the first galaxies that ever lit up.
→
Polarization
Light vibrates in a direction. Some animals can see this.
→
Infrared
Your skin can see infrared. Your eyes just can't.