Information on the equipment and center, general and professional astronomy, and observing, including images and icons.

Facilities include 200 inch, 60 inch, 48 inch, 18 inch, and the Snoop, and provides, general and visitor information, history, images, news, and research results.

The German-Spanish Astronomical Center at Calar Alto, Spain includes location, visitor information, equipment description, newsletter, and news operated by the Max Planck Institute for Astronomy.

International partnership comprised of two 8.1-meter telescopes with equipment description and location, news, press releases, and newsletter.

International project consisting of two 8.4 meter mirrors on a common mount with general information, equipment information, news, and updates.

Is 6.5 meters in diameter and provides historical information, public access information, and visual resources.

A Very Large Telescope will consist of four 8-meter telescopes which can work independently or in combined mode, and includes information on observing, the site, and the project.

Is 8.2 meters, and includes general information, equipment and instrument information, presentations, and images.

Comprised of two 10 meter telescopes includes information on equipment and instruments, with images and movies, observing information, and news.