L1 lens, 2018 photo by LSST ( Large Synoptic Survey Telescope ) first put into service this year, in June 2025 • CC BY 4.0 via Wikipedia

Spinoza would've loved to see this.

The human-sized L1 lens of the Rubin Observatory camera, or the first lens of the observatory's telescope, at 1.55 m in diameter, the largest lens ever built.

#Astronomy #RubinFirstLook #NightSkyViewer