网站简介：Mail order retailer of astronomical telescopes and accessories, CCD equipment, birdwatching and nature study binoculars and spotting scopes, since 1979. Located in Oklahoma (United States).
网站简介：General information, news, research information, observing and facilities information, education, images, calendars, and links.
网站简介：The department, observatories, academics, research activities, events, resources, and public outreach.
网站简介：From The Exploratorium; stories focusing on the science, historical accounts, and natural wonder of solar eclipses.
网站简介：General information, news, equipment information, schedules, documentation, archives, resources, and links.
网站简介：Research, publications, people, academia, and on-line resources.
网站简介：Investigating the sun and solar system, stars, supernova remnants and pulsars, interstellar gas and nebulae through radio and infrared emissions.
网站简介：MAST supports a variety of astronomical data archives, with the primary focus on scientifically related data sets in the optical, ultraviolet, and near-infrared parts of the spectrum.
网站简介：Planetarium program showing the sky on any date, from any place on earth. Has features to benefit a wide range of interest levels, from the beginning hobbyist to the seasoned professional. [Commercial, Win98/NT, MacOS]
网站简介：Sloan Digital Sky Survey (SDSS) will eventually provide detailed optical images covering more than a quarter of the sky, and a 3-dimensional map of about a million galaxies and quasars.
网站简介：Entire Astrophysics course online. Very extensive introduction course to stars.
网站简介：Manufacturer and distributor of Sky-Watcher refractors, reflectors, dobsonians, catadioptrics, spotting scopes, binoculars, mounts, eyepieces, motor drives and finderscopes.
网站简介：A NASA and JPL site in search of another Earth
网站简介：Information, news, events and technical reports, documents, gallery, and links.
网站简介：Offers real time images and observations of the Sun from a variety of ground and space sources.
网站简介：Large selection of cameras, binoculars, telescopes and accessories.
网站简介：Robotic telescope on the island of Tenerife operated by the Cybernetics department. Tour the observatory and try out the telescope.
网站简介：Offers data which may predict an aurora, pictures of past displays, practical projects and email notification of favourable conditions.
网站简介：Japanese manufacturer and exporter of optical filters for telescope and industrial use.
网站简介：Calculates the times of sunrise, sunset, moonrise, moonset, transits, and the beginning and end of civil twilight, along with information on the Moon's phase by specifying the date and location.
网站简介：Calendar, programs, membership, news, resources, guide, field trip planning, and resources.
网站简介：Makes telescopes, mounts and accessories for observers and astrophotographers. Includes product descriptions, prices, photo gallery, and printable order form.
网站简介：Retail store in Tucson, Arizona, offering online shopping for telescopes, binoculars, software, books, and star guides for astronomy and birding. Searchable catalog.
网站简介：PixInsight is a modular, open-architecture, portable image processing software platform. PixInsight is specialized in technical image processing tasks such as astronomical imaging, and is available for Linux/UNIX, Mac OSX and MS Windows. PixInsight has been created by Pleiades Astrophoto, a software development company based in Spain.
网站简介：What's new, mini-FAQ, and table of contents.