On this day in 1839 - January 9th - Thomas Henderson published his determination of the distance to Alpha Centauri.
Henderson had actually been the first person to calculate the distance to a fixed star by using stellar parallax. However he had delayed publishing his results, and the credit for being first went elsewhere.
We take forum safety very seriously here at BellaOnline. Please be sure to read through our Forum Guidelines. Let us know if you have any questions or comments!