LMR-055 · Stars
Pulsar
A neutron star lighthouse, blinking hundreds of times a second.
§ 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.
Imagine a lighthouse on a hill with a big lamp inside that spins around. From boats out at sea, the lamp doesn't look 'on all the time' — it flashes, bright, dark, bright, dark, every time the beam sweeps their way. In the sky, there are tiny spinning leftover stars that work exactly like that. They have a beam of light shooting out, and they spin so fast that every time the beam sweeps past Earth we see a tiny flash. Through our telescopes, it looks like a clock ticking in the sky, sometimes hundreds of times per second. The first one was so steady that astronomers briefly wondered if it was aliens. (Spoiler: no. But honestly fair.)
§ Strange but true
- 01A neutron star that spins hundreds of times per second and beams radio across the galaxy. Nature's lighthouse.
- 02The first one detected was nicknamed LGM-1 — 'Little Green Men' — because the signal was too regular to be natural.
- 03Some pulsars keep better time than atomic clocks. We use a network of them as a galaxy-sized gravitational-wave detector.
§ From the field journal
Pulsar
"A neutron star lighthouse, blinking hundreds of times a second."
— observed, sketched, not yet fully understood.
§ Nearby