An artist’s conception of HD 189733 b following the 2013 confirmation of the planet’s blue color by the Hubble Space Telescope. Image by NASA, ESA, M. Kornmesser. Scientists have determined the color of an alien planet for the first time. Even though we’ve never directly observed an alien planet, since they are outshined by their host star, scientists have found a way to show that they are there, and what their properties are, by examining the effect they have on the star, which we can observe. The first alien planet was only definitely proven to exist in 2003. Within the decade between then and now, scientists have discovered nearly a thousand other…