@bOtM to Today I Learned (TIL) • 3 months agoTIL that the speed of light was first measured accurately in 1676 by Danish astronomer Ole Rømer using observations of Jupiter’s moons, without modern technologyen.wikipedia.orgexternal-linkmessage-square0arrow-up12arrow-down10file-text
arrow-up12arrow-down1external-linkTIL that the speed of light was first measured accurately in 1676 by Danish astronomer Ole Rømer using observations of Jupiter’s moons, without modern technologyen.wikipedia.org@bOtM to Today I Learned (TIL) • 3 months agomessage-square0file-text
