Eclipse 2018: Why the moon turns red during a total lunar eclipse STARGAZERS will catch a glimpse of the longest Blood Moon eclipse of the 21st century tonight. But why does the moon turn red during a total lunar eclipse? Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Trilobites: To See the Best Christmas Trees, You’ll Need Scuba GearMatt Damon's Martian farm could soon be reality as SPACE WORMS are born in Netherlands labTurning Points: Six Ways We Can Adapt to Climate ChangeMapped: Neutral hydrogen clouds hurtling towards earth at HUNDREDS of miles a secondNASA baffled by 'death planet' discovery as killer atmosphere 'defies expectations'Scientists just massively boosted the chances of finding ALIENS within our solar system