Hacker News new | past | comments | ask | show | jobs | submit login

You can do that on earth, too. See https://en.wikipedia.org/wiki/NASA_Orbital_Debris_Observator..., https://en.wikipedia.org/wiki/Large_Zenith_Telescope for (decommissioned) examples (both found via https://en.wikipedia.org/wiki/Liquid-mirror_telescope)

The idea apparently came from Isaac Newton.




Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: