Click on the image for a full resolution version   ALS 19653 is a B0.5 Ib blue supergiant star located in the constellation Serpens cauda. This image is the result of a ProAm collaboration with Prof. Vasilii Gvaramadze (Sternberg Astronomical Institute, Moscow). The goal was to acquire a full color image of a mass ejection … Continue reading ALS 19653, a star with two nested shells