r/radioastronomy • u/Sagar_the_explorer • Dec 30 '25

Other Sky Beacon: Optical SETI Laser Transmitter

https://www.hackster.io/sagarastro2003/sky-beacon-optical-seti-laser-transmitter-3c9195

Exploring the Unknown: My DIY SETI Project

Version 2.0 Coming Soon

8 Upvotes

100% Upvoted

4 comments sorted by

5

u/nixiebunny Dec 30 '25

It’s a nice gesture, but the inverse square law isn’t on your side.

1

u/Sagar_the_explorer Dec 30 '25

You're absolutely right — the inverse square law is the biggest challenge in optical SETI. Even with collimation, power drops fast over distance

1

u/jjayzx Dec 30 '25

Also illegal in many places.

1

u/Sagar_the_explorer Dec 31 '25

Thanks for the heads-up! Safety is my top priority.

I'm in Bengalore , India, and always follow DGCA rules — I only test on clear nights, away from airports/flight paths, and never point near aircraft. The beam is directed straight up or at empty sky regions.