"One of the best collections of links to astronomy-related information available on the Internet. The database is maintained by the AstroWeb Consortium, a collaboration involving nine individuals at seven institutions."
Links to many metasites, directories, databases, catalogs, e-prints, publications, people, institutions, organizations, software, reference, and miscellaneous resources. By librarians of the Physics-Astronomy-Math Division of the Special Libraries Association.
A resource for users who have a general interest in astronomical topics; maintained by the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA's Goddard Space Flight Center.
ESA is an international organisation with 18 Member States. It conducts programs to find out more about Earth, its immediate space environment, the Solar System and the Universe.
The chief international organization of professional astronomers. Organizes scientific meetings, sets international standards and promotes educational activities.
"SEDS is an independent, student-based organization which promotes the exploration and development of space." The site can provide an organized pathway to start space related projects with alternatives to the usual classwork.