Links

This handy list is in no case a 'links farm' but a list of the most useful sites at hand, made available for the astronomical community
(links to those sites are in no case an endorsement of the content found therein nor a guarantee of the accuracy of it)

Manufacturers and Dealers Organizations Observatories and Space Telescopes Learning, News	Celestial Objects Space Observation Softwares

Manufacturers and Dealers

Manufacturers

Manufacturers

Questar
Celestron
Meade
Médas. The famed French dealers in the field of fine telescopes
Perl-Vixen. A French manufacturer of telescopes
Lumicon. Astronomical filters and accessories. note! That brand has been acquired by another as the filter's line seems no more available

Organizations

NASA (NASA Apps are available for smartphones and tablets as NASA also provides for free E-books. NASA's Jet Propulsion Laboratory also features applications) as NASA sit is filled with varied resource as that makes it worth to wander in
Bureau des Longitudes (France; French adress)
U.S. Naval Observatory (USA), a fine site with varied ressource
American Astronomical Society
Société Astronomique de France (SAF) (France)
USGS (U.S. Geological Survey), a fine site where useful miscellaneous maps in terms of planetary bodies may be found
The Vatican Observatory. A useful theoretical resource through its annual reports
International Astronomical Union (IAU)
Bureau International des Poids et Mesures. The heart of the International System of Units (SI)
S.P. Korolev Rocket and Space Corporation "Energia". The company is the prime developer and contractor of the Russian manned spaceflight program; one may also check Roskosmos, the Russian space agency (site in Russian)

Observatories and Space Telescopes

European Southern Observatory (ESO)
HubbleSite
Chandra

Learning, News

ADS. NASA Astrophysics Data System. For advanced amateurs who are interested in the academic literature
AAAS. The American Association for the Advancement of Science. For advanced amateurs who are interested in the academic literature

Celestial Objects

General Celestial Mechanics Sun Solar System Planets Earth's Moon

Comets, Shooting Stars NEOs Deep Sky Objects Exoplanets Exobiology

General

Science@NASA. This NASA's site is publishing popularisation pages (astronautics, astronomy). Archives of these pages since 1996 are available
Astronomy Picture of the Day. Pictures with data. An archive of published pictures is available

Celestial Mechanics

JPL/SSD. A JPL site
National Space Science Data Center (NSSDC)

Sun

Solar Physics . The Sun by NASA's Marshall Space Flight Center
SOHO. ESA/NASA Soho probe official site

Solar System Planets

Planetary Photojournal. The classical NASA imagery site
Lunar and Planetary Institute. A fine site of an advanced level
USGS Astrogeology Research Program. USGS branch about astrogeology. A professional level site
Solar System Simulator. A NASA/JPL/Caltech site, interesting to download mosaics of the solar system bodies

Earth's Moon

Apollo Over the Moon: A View From Orbit. A useful advanced site of Moon's Apollo program views

Comets, Shooting Stars

- none for now -

NEOs

Center for Near Earth Object Studies (cneos) (JPL)

NASA's Planetary Defence

ESA's NEO Coordination Centre

Deep Sky Objects

- none for now -

Exoplanets

California & Carnegie Planet Search
Planet Quest. A JPL site

Exobiology

Astrobiology, exploring the living universe .... NASA's Ames Research Center site about astrobiology

Space

NASA
Jet Propulsion Laboratory (JPL)
Smithsonian, National Air and Space Museum. Washington, DC. flagship building, and new Udvar-Hazy Center
ESA. The European space agency
JAXA. Japan Aerospace Exploration Agency. The Japanese space agency

Observation

Ephemeris Generators Sunspots, Solar Activity Planets Moon Comets

Meteor Showers Eclipses, Transits Lunar and Planetary Occultations Satellites

Ephemeris Generators

JPL's HORIZONS System at JPL's site JPL/SSD. A fine and useful ephemeris generator for minor bodies (asteroids, NEOs, comets)

Sunspots, Solar Activity

SOHO. Although now hampered by blackout periods, the ESA/NASA Soho probe continues to observe the Sun
SDO. A NASA mission observing the Sun with a improved precision, and 3D views
Stereo. A NASA mission observing CMEs 3D
spaceweather.com. A NASA-related site, centered on the solar activity
Space Environment Center (SEC). Most useful solar section of the NOAA (the American weather agency) with the 'Space Weather Enthusiasts Dashboard', the page dedicated to amateur astronomers

Planets

A.L.P.O. (Association of Lunar & Planetary Observers)

Moon

- none for now -

Comets

British Astronomical Association Comet Section. A good page about comets

Weekly Information about Bright Comets page Also a good page, which often points to comets close to the visual magnitude

Meteor Showers

The American Meteor Society
IMO, The International Meteor Organization. Useful

Eclipses, Transits

NASA Eclipse Web Site. NASA's site about eclipses
MrEclipse.com. Famed eclipses specialist Fred Espenak's personal website, with a link to Espenak's other site, EclipseWise.com. AstroPixels.com is also a Fred Espenak's site, with a wide ephemeris section

Lunar, Planetary Occultations

The International Occultation Timing Association

Satellites

Heavens Above
Visual Satellite Observer's Home Page

Softwares

Celestia. A fine, useful, and free 3D planetarium
Cartes du Ciel. A fine and free astronomical charts and ephemerides generator! A renewed version of the ancient one, as that latter is downloadable from that page, at bottom
Stellarium. A fine, free, simple astronomical charts generator!
IRIS. Christian Buil's site for the IRIS astrophotography images stacking freeware