Sky & Telescope and its associated businesses are part of AAS Sky Publishing, LLC, a wholly owned subsidiary of the American Astronomical Society. Shop at Sky is the online shopping companion for Sky & Telescope magazine, which was founded in 1941 and remains the essential guide to astronomy. The company's headquarters are in Cambridge, Massachusetts, near the Harvard-Smithsonian Center for Astrophysics. In addition to the monthly Sky & Telescope magazine and skyandtelescope.org, the company publishes annual special issues as well as globes, books, star atlases, prints, and other fine astronomy products. Sky & Telescope also runs astronomy tours around the world to view eclipses and auroras, visit famous observatories, and do stargazing, among other activities.