Meteorer
Planeter
- Association of Lunar and Planetary Observers (ALPO)
- BAA Solar section web page
- Center for Earth and Planetary Studies (CEPS)
- Hakan's Space Balls (storleksjämförelse mellan planeter och stjärnor)
- Hypothetical Planets
- The International MarsWatch
- International Outer Planet Watch
- JPL Solar System Simulator
- LPI Lunar and Planetary Institute
- The Nine Planets
- Planetary Data System
- Planetary Photojournal: NASA's Image Access Home Page
- The Planetary Rings Node
- Planetary Sciences at the NSSDC
- Solar Observing by Peter Meadows
- Soviet Space Image Catalog
- The Terraforming Information Pages
- USGS Astrogeology Research Program
- Views of the Solar System
- Planeter kretsande kring andra stjärnor
- California & Carnegie Planet Search
- Extrasolar Planets Encyclopaedia
- ETD - Exoplanet Transit Database
- Planet Hunters
- transitsearch.org
Variabla stjärnor
- SAAFs Variabelsida
- AAVSO Alert Notices
- American Association of Variable Star Observers (AAVSO)
- Asociacion de Variabilistas de Espana
- A Beginner's Guide to Cataclysmic Variables
- The Epsilon Aurigae Eclipse Campaign Homepage
- General Catalogue of Variable Stars (Sternberginstitutet, Moskva)
- The Information Bulletin on Variable Stars
- Latest Supernovae
- Top 22 Variable Stars
- Variable Star Group (Astronomical Society of South Australia)
- BAA VSS
- BYU Variable Star Database - Phase 1
Dubbelstjärnor
- Astronomical League's Double Star Club
- Astrometry & Dynamics: Double & Multiple Stars
- Binary and Multiple Stars
- The Double Star Library
- Double Star Log
- List of selected visual double stars for amateur astronomers
- Lookum Observatory, double stars
- Nightfall Eclipsing Binary Star Program
- Orbital elements of selected visual binaries
- The Washington Double Star Catalog
- The Winnecke Catalog of Double Stars
- Up-to-date Linear Elements of Eclipsing Binaries
- Webb Society Double Star Section
Djuprymdsobjekt, stjärnbilder
- Arp Atlas of Peculiar Galaxies
- The Constellations (Earth and Space Network)
- The Constellations (Munich Astro Archiv)
- The Interactive NGC Catalog Online
- Images of 338 Arp Galaxies
- Messier45.com - Deep Sky Browser
- The NGC/IC Project
- The NASA/IPAC Extragalactic Database
- SEDS Messier Catalog
- SIMBAD Astronomical Database
- The STScI Digitized Sky Survey
- The Webb Society
Astronomihistoria
- Föremål och platser
- Antikytheramekanismen
- Antique Telescope Society
- Astronomiska ur: Bern, Lund, Prag, Strasbourg
- The British Sundial Society
- Chamberlin Observatory - Denver, CO, USA
- De svenska observatoriernas historia: Lund, Stockholm, Uppsala
- Förderverein Großer Refraktor Potsdam e.V.
- Pekings gamla observatorium
- Royal Observatory, Greenwhich
- Rundetaarn
- The Starry Messenger (Electronic History of Astronomy)
- Lämningar efter Ulugh Beg
- Venuspassageexpeditioner
- Personer
- Astronomiae Historia
- Astronomiegeschichte: Personen
- Tyge Brahe, Brahebysten i Lund, Astronomiæ instauratæ mechanica
- Indexes of Biographies - MacTutor History of Mathematics archive
- The Bruce Medalists
- Annie Jump Cannon
- The Galileo Project
- The Herschel Museum of Astronomy
- Edwin Hubble
- Christiaan Huygens
- Kepler-Gesellschaft e.V.
- Johannes Kepler-Museum in Weil der Stadt
- Nicolaus Copernicus Museum in Frombork, De revolutionibus
- Isaac Newton Resources
- Ole Rømers Venner, mätningen av ljusfarten
- Porträtt av astronomer
Astrofotografering, CCD
- Apogee Instruments CCD Imaging Cameras
- Astrophotography by Steve Mandel
- Astrophotography with small telescopes
- Brad Wallis & Robert Provin Astrophotography
- Chris Vedeler's Astrophotography Gallery
- Chuck's Astrophotography
- Galaxy Photography
- Jerry Lodriguss - Deep Sky Astrophotography
- K3CCDTools
- Portable All-Sky Reflector
- QuickCam Astrophotography
- QuickCam and Unconventional Imaging Astronomy Group
- RegiStax Free Image Processing Software
- SBIG Astronomical Instruments
- Starlight Xpress Cameras and Systems
- Starlight Xpress Message Board
- Stellar Scenes Homepage (Japan)
Amatörteleskop, optiktillverkning (ATM)
- SAAFs Optik- och Teleskopsektion
- Aluminisering av teleskopspeglar
- An amateur telescope maker's projects
- Aperture Fever: Telescope Making & Makers
- Crni Vrh Observatory
- David Stevick
- Dan Bakken & Hercules
- Fremont Peak Observatory Association
- Ken's Telescope Calculator
- Large Amateur Telescope Group70
- Mel Bartels' Home Page
- Nyrölä Observatory
- Observing with a small telescope
- The Puckett Observatory
- Robert Ferguson Observatory
- Schiefspiegler Telescopes
- S*T*A*R Astronomy - Telescope Making Links
- Svenska amatörobservatorier
- The Telescope Review Web Site
- Tenagra Observatories (USA)
Teleskoptillverkare, tillbehör, återförsäljare
- Gunnar Olssons Foto AB
- Schous Optik Agentur
- Rymdbutiken
- TeleskopService
- AstroSweden
- Astronomics, Ltd.
- Baader-Planetarium GmbH - Mammendorf
- Celestron International
- Company Seven Astro-Optics Division Home Page
- Focus Camera & Video Store Homepage
- Kikkerter og teleskoper - Astro har Skandinaviens største udvalg
- Lichtenknecker Optics N.V.
- MEADE Instruments Corporation
- MURNAGHAN Instruments [f.d. Coulter]
- Observa-DOME
- Oceanside Photo and Telescope
- ProtoStar Astronomy Products
- Ryska teleskop (TAL, Astrosib)
- ScopeCity (USA)
- Orion Telescopes and Binoculars
- Tele Vue Optics