RT @binarybits: “Between 1600 and 1900, there were 0 tetrads. So in terms of lunar eclipses, this is a pretty lucky time to be alive” vox.com/2014/4/14/5613…
RT @binarybits: “Between 1600 and 1900, there were 0 tetrads. So in terms of lunar eclipses, this is a pretty lucky time to be alive” vox.com/2014/4/14/5613…