Primary links

This year's topic is stellar evolution and variable stars, and V1 is standard nomenclature for variables. V1 is a Cepheid variable star in the Andromeda Galaxy (M31). It is a very famous Cepheid as this was the star that Hubble observed and analyzed which showed that M31 was not a nebula but an entire galaxy and the universe became a much larger place. The Hubble observatory has made several observations of this variable and one link for information about V1 is http://www.spacetelescope.org/images/opo1115e/ or http://www.nasa.gov/mission_pages/hubble/science/star-v1.html