Astronomy is the world's best-selling astronomy magazine, covering topics such as skywatching, astrophotography, and the latest discoveries and missions. It has a monthly circulation of over 100,000 and a website with over 1 million monthly visitors.
Sky & Telescope is another leading astronomy magazine, founded in 1941 by amateur astronomers. It features articles, reviews, tips, and events for enthusiasts of all levels. It has a monthly circulation of over 70,000 and a website with over 600,000 monthly visitors.
NASA is the U.S. space agency that conducts scientific and exploratory missions to the Solar System and beyond. It is a primary source of astronomy news, images, videos, and educational resources. Its website attracts over 30 million monthly visitors and has multiple subdomains for different programs and topics.
ESA is the European space agency that collaborates with NASA and other partners on various astronomy and space projects. It also provides news, multimedia, and educational materials on its website, which has over 10 million monthly visitors. Some of its subdomains include Hubble, Planck, Gaia, and Rosetta.
Space.com is a popular website that covers astronomy, space exploration, and related topics. It features news, articles, videos, podcasts, galleries, and forums. It has over 20 million monthly visitors and is part of the Future plc media group.