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"This unique resource covers the entire field of astronomy and astrophysics and this online version includes the full text of over 2,750 articles, plus sophisticated search and retrieval functionality, links to the primary literature, and is frequently updated with new material."
"The Astronomical Almanac is an interactive utility that can calculate the position of any astronomical object for any time, date and location on Earth. It also provides details for the Sun, Moon and planets."
"The Virtual Observatory is an international astronomical community-based initiative. It aims to allow global electronic access to the available astronomical data archives of space and ground-based observatories and other sky survey databases. EURO-VO aims at deploying an operational VO in Europe. It supports the utilization of VO tools and services by the scientific community, technology take-up and VO compliant resource provision, and building of the technical infrastructure. "