Princeton University astrophysicists were part of an international collaboration to produce stunning images of the Andromeda Galaxy (above) using the new Hyper-Suprime Cam installed on the enormous Subaru Telescope atop Mauna Kea in Hawaii. The images of Andromeda demonstrate the new camera’s ability to capture images for a large-scale survey that will help scientists understand the evolutionary history and fate of the expanding universe. The first image shows the entire Andromeda Galaxy. The red box centers on a part of the galaxy’s disk (second image) just above the center with young stars (blue) and hydrogen clouds (green) visible. The purple box focuses on a band of Andromeda (third image) in which a number of galaxies hundreds of millions of light years away can be seen in the background. The faint red stars scattered over the image are stars in the Milky Way, while the blue stars belong to Andromeda. (Photos courtesy of Robert Lupton and the HSC team)