https://phys.org/news/2019-01-amazing-images-sunday-total-lunar.html > My latest #lunareclipse2019 animation! pic.twitter.com/n0MtpRxTfS > This is in line with what observers have seen in previous years recently, as total lunar eclipses—even ones venturing relatively deep into the dark shadow umbra of the Earth—have all been fairly bright. Many observers also noted a bluish tinge on the upper bright limb of the moon. This interesting aspect of the recent total lunar eclipse was the result of a relatively dust and aerosol free atmosphere here on Earth, failing to filter and scatter out blue light refracted into the shadow umbra cast back on the moon.