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Websites in "Astronomy"
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• A Science Strategy for the Exploration of Europa
A report by the Committee on Planetary and Lunar Exploration Space Studies Board Commission on Physical Sciences, Mathematics, and Applications on the future of Europa exploration.
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• A Search for Evidence of Interplanetary and Atmospheric Microbial Delivery Systems
Conference paper on the solar wind propelled interplanetary viral and bacterial movements.
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• A Shot in the Dark
Solar system, Milky Way, extra galactic, and wide field images, and equipment information.
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• A Tutorial on Radio Pulsars
A tutorial from the Australia Telescope National Facility, Parkes, New South Wales
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• A Wild Hypothesis
Essay on the development of civilizations.
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• A.L.P.O. Mars Section
Includes staff, observing alerts and recent observations, email list, and publications.
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• AAO Color photographs
Cataloged assortment of images. Contains galaxies, nebulae, and unusual stars.
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• Aarseth's N-body software
[open source - multiplatform] Direct N-body algorithms.
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• AAS Solar Physics Division
[Greenbelt, Md] Members, organization, news, meetings, contacts.
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• AAVSO International Database
Over 10 million variable star estimates dating back over 100 years.
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• AB Engineering, Inc.
Computer controlled telescopes, equatorial mounts with optional computer control, custom worm drive systems and custom accessories. Custom telescope retrofit and repair services.
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• Abbeville Telescope Company
Dealer for TeleVue, Losmandy, and Coronado, located in South Georgia. We are able to demonstrate these quality products in the dark skies offered in our rural location in Abbeville, GA.
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• Aberdeen Astronomical Society
News and events, gallery, and sky notes.
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• Aberrator
Freeware, Version 3.0, that generates star-testing images to show the effects of distortions influencing the quality of a telescope's performance.
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• Abhijit's Planet
Abhijit Dharmadhikari, a self expression.
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• Abingdon Astronomical Society
Program, news, newsletter, library, and telescope loan program.
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• About Astronomy
Dedicated for beginners desiring to learning astronomy such as telescopes, accessories, star charts, forum and clear sky clocks.
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• About Astronomy & Space - Two Architectures Chosen for Terrestrial Planet Finder
Discover NASA's plan for advanced telescope searches for Earth-like planets around other stars. Learn about 2 separate missions with distinct designs to achieve the goal.
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• About Atmosphere
Summary information regarding the atmospheres of each planet in our solar system.
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• About Auroras
Concise introduction to the phenomena that are the lights in the sky.
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• Abrams Planetarium
Skywatchers areas, sky calendar, programs, staff, and history.
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• Absolute Astronomy
Facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects.
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• Absolute Beginner's Astronomy Forum Archives
Discussions and questions with answers.
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• ACalendar.com
The calendar has many options with a standard monthly interface, including sunrise, sunset, and Moon phases.
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• Accreting White Dwarfs
Deep research from the TeSRE Institute - an Italian body who analyze observations in the IR, optical, X-ray and gamma ray energy bands.
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• Across Country by Solar Eclipse
Brief description and maps of the Dec. 4 eclipse.
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• ACT Imports
On-line store of a wide range of binoculars, rifle scopes, spotting scopes, night vision and rangefinders. Located in Missouri.
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• Action Optics
A long established optical instrument repair workshop. Business also sells new, second hand and vintage equipment including binoculars, opera glasses, astronomical and terrestrial telescopes, accessories, nightsights and rifle sights.
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• Active Galaxies and Quasars
Provides an introduction to galaxies and quasars. Includes an FAQ, quizes, and links.
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• Active Optics (AO) for Amateur Imaging
Images and tips by the authors of a book on astronomical photography.
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• AcuSat
An application used to align satellite dishes to geostationary satellites.
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• ADC - Astronomical Data Center
NASA's ADC is a resource for astronomical data, catalogs, and journal tables.
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• Adelaide Optical Centre
Australian retailer of telescopes, binoculars, magnifiers and visual aids plus a variety of accessories. Site features an on-line dictionary of optical terms commonly used by manufacturers in their product descriptions.
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• Adler
Astronomy information, education resources, visitor's guide, exhibits and shows, and news center.
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• Adler Planetarium - Historical Collections
Collection of instruments, past exhibitions, history department information.
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• Advance Optical & Instruments
Student and laboratory microscopes, binoculars, spotting scopes and accessories. Offers binocular and microscope repair services. Located in Texas.
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• Advanced Optics Limited
Produces the Vanguard 500, a complete 20" Ritchey-Chretien Telescope system.
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• Advanced Telescope Systems
Portable and permanent telescope piers in custom sizes and heights. Custom manufactures accessories for special customer needs.
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• Adventures in Astrophotography
Background, equipment, dark sites, and gallery.
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• Aeroquest Machining
Worm gear drives for the accurate tracking of deep space and planetary objects for viewing and imaging. Stepper and synchronous motor power systems are available.
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