2026-07-07 Adventures in Deep Space Challenging Observing Projects for Amateur Astronomers: Adventures in Deep Space is a rich amateur astronomy resource built by Steve Gottlieb and collaborators, offering challenging observing projects covering peculiar galaxies, galaxy clusters, Abell planetaries, and much more. Packed with NGC/IC notes, finder charts, observing reports from star parties, and curated catalogs, it is a go-to destination for serious deep-sky observers hunting rarely seen objects.
2026-07-07 Akira Fujii constellations A stunning image gallery showcasing the complete Akira Fujii and David Malin Images (DMI) collection of astrophotography, organized into categories including constellations, Milky Way, star trails, solar eclipses, comets, and aurorae. The collection features wide-field photographs of the southern sky taken from Australian observatories, capturing objects like the Southern Cross, Carina Nebula, and Comet McNaught with remarkable detail.
2026-07-07 Al Kelly's CCD Astrophotography Page Al Kelly's dedicated astrophotography site showcases stunning CCD images of galaxies, nebulae, star clusters, and solar system objects captured with equipment including a Celestron CGE 1400 telescope and Orion Parsec 8300C camera. Beyond the image galleries, the site offers a CCD instruction manual, a G2V color calibration article, and links to fellow astrophotographers, making it a valuable resource for amateur astronomers interested in CCD imaging.
2026-07-07 All cats are fueled by autism in their own unique way. Tangle's personal corner of the web belongs to an autistic Australian graduate student of Space Science with wide-ranging interests and ambitious creative projects. The site features a blog, character bios, and various personal sections, all wrapped in a warm and quirky introduction that hints at much more content to come.
2026-07-07 ALPO Home Page - Association of Lunar and Planetary Observers The Association of Lunar and Planetary Observers (ALPO) is a long-running scientific organization connecting amateur and professional astronomers who study the Solar System, with dedicated sections covering everything from Mercury and Venus to comets, meteors, and eclipses. Visitors can access the latest issue of their peer-reviewed journal 'The Strolling Astronomer,' join observing sections, and tap into decades of planetary observation data and community research.
2026-07-07 Amateur Astronomical Observatories | List Of Astronomical Observatories The Nine Planets hosts a curated list of amateur astronomical observatories built by individual hobbyists, compiled by the site owner during research for their own backyard observatory project. Visitors will find practical inspiration and design ideas ranging from simple roll-off roof builds to more complex dome structures, all set within a broader astronomy reference site covering planets, stars, comets, and equipment guides.
2026-07-07 Ames Area Amateur Astronomers The Ames Area Amateur Astronomers (AAAA) is a non-profit 501(c)3 club based in Ames, Iowa, dedicated to sharing the wonders of the night sky through outreach events, club meetings, and the annual Iowa Star Party. Members gain access to a newsletter, astronomy updates, and the club's observatory at McFarland Park, making it a great hub for both beginners and seasoned stargazers in central Iowa.
2026-07-07 An Atlas of The Universe Created by Richard Powell, this stunning educational site presents nine nested maps of the universe, each roughly ten times the scale of the previous, zooming out from the nearest stars to the entire visible universe 14 billion light years away. Multilingual and richly illustrated, it offers a rare sense of cosmic scale that makes abstract astronomical distances genuinely comprehensible.
2026-07-07 An Etymological Dictionary of Astronomy and Astrophysics - English-French-Persian Created by M. Heydari-Malayeri at the Paris Observatory, this trilingual etymological dictionary covers thousands of astronomy and astrophysics concepts in English, French, and Persian, tracing the roots and definitions of terms from the oldest to the newest. It stands out as a freely accessible, interdisciplinary reference that fills a gap left by conventional astronomical glossaries, with entries organized alphabetically and supplemented by historical and linguistic context.
2026-07-07 An Observing Guide For Comets Created by Martin McKenna of Nightskyhunter.com, this detailed guide covers everything an amateur astronomer needs to observe comets, from naked-eye viewing to advanced astrophotography and scientific contribution through light curve work. The site includes comet sketches, hunting statistics, observing adventure logs, and links to major comet resources, making it a rich reference for anyone fascinated by these unpredictable visitors to our skies.
2026-07-07 Ancient-Skies - Human Cultures and Their Skies - Home Ancient-Skies is a collaborative scientific knowledgebase dedicated to documenting how human cultures across history have understood and represented the night sky. The project, launched around the International Year of Astronomy 2009, aims to gather and verify information from primary sources, making cultural astronomy accessible to both the general public and researchers worldwide.
2026-07-07 Antelope Valley Astronomy Club - Welcome to the Antelope Valley Astronomy Club The Antelope Valley Astronomy Club (AVAC) is a nonprofit organization founded in 1982 to share the wonders of the night sky with families in northeastern Los Angeles County. Members range from beginners to advanced observers, and the club offers monthly meetings, school presentations, observing programs, and resources like telescope guides and DSO observing lists.
2026-07-07 Ant�nio Cidad�o's Home-Page of Lunar and Planetary Observation and CCD Imaging António Cidadão's dedicated astronomy site showcases years of lunar and planetary observation from Carcavelos, Portugal, featuring CCD imaging of the Moon, Mars, Jupiter, and Saturn captured with a 14-inch SCT telescope. The site includes detailed imaging guides covering super-resolution techniques, tri-colour imaging, limb darkening correction, time-lapse animations, and a Moon-Light Atlas reference, making it a rich resource for amateur planetary imagers.
2026-07-07 AOS of NY - Web Site Links The Amateur Observers' Society of New York maintains this comprehensive links directory covering astronomical magazines, podcasts, space agencies, comet and meteor shower resources, astronomy apps, dealers, and member websites. A well-organized gateway for amateur astronomers in the New York area, the page also highlights member-exclusive discounts on publications like Sky and Telescope and Astronomy Magazine.
2026-07-07 Around Physics and Astronomy A rich hobbyist resource by J. Giesen featuring an extensive collection of Java and JavaScript applets covering astronomy topics like sun and moon phases, planet positions, sundials, Venus transits, and satellite observation. Visitors will also find physics quizzes, chaos and fractal simulations, color theory tools, and links to books and software, making it a deep interactive playground for science enthusiasts.
2026-07-07 Arp's Catalog Of Peculiar Galaxies A comprehensive amateur astronomy resource dedicated to Halton C. Arp's Atlas of Peculiar Galaxies, cataloging all 338 peculiar and interacting galaxy entries with supporting data, imagery, and observing guidance. Built by and for amateur observers, the site bridges professional archival photography from the Palomar 200-inch telescope with modern amateur CCD imaging to show that anyone with a backyard telescope can observe these remarkable objects.
2026-07-07 ASN Homepage The Astronomical Society of Nevada (ASN) has been promoting astronomy education and public outreach since 1934, making it one of the longer-running amateur astronomy clubs in the region. Visitors can find club membership info, meeting schedules at the Fleischmann Planetarium in Reno, observing resources, photo galleries, and details on events like Messier marathon nights.
2026-07-07 ASSA Bloemfontein Astronomy Club The ASSA Bloemfontein Centre is a non-profit astronomy club based in Bloemfontein, South Africa, welcoming enthusiasts of all experience levels with interests ranging from astrophotography to telescope making. The site chronicles their annual Free State Star Party events spanning over a decade, shares resources including radio segments on stars and planets, and preserves local astronomical history such as the historic Lamont-Hussey Observatory.
2026-07-07 ASTAP & HNSKY programs Home of ASTAP and HNSKY, two free astronomy programs offering image stacking, plate solving, and a full-featured planetarium for amateur astronomers and astrophotographers. The creator also shares their own astrophotography images and equipment details, making this a practical hub for both software users and sky enthusiasts.
2026-07-07 Asterisms David Ratledge's guide to observing asterisms takes readers through a collection of star patterns visible through binoculars and small telescopes, complete with images and observing tips. Inspired by a 1998 Sky & Telescope article, this page celebrates overlooked celestial dot-to-dot patterns like Kemble's Cascade, the Coathanger, and the ET Cluster with genuine enthusiasm and hands-on detail.
2026-07-07 Asteroid Occultation Predictions Steve Preston's long-running resource provides predictions for asteroid occultation events, listing when asteroids will pass in front of stars as seen from Earth. Covering upcoming events through 2026 with supplementary observation guides and FAQs, it serves as a reference for amateur and professional astronomers tracking these brief but scientifically valuable phenomena.
2026-07-07 Astro Links The Astronomical Society of Greenwich Hills (ASGH) maintains this curated links page connecting amateur astronomers to periodicals, regional astronomy clubs, observatories, equipment suppliers, and NASA educational resources. A thorough reference hub for stargazers in Connecticut and New England, it lists dozens of affiliated clubs and organizations alongside tools for both hobbyists and kids.
2026-07-07 Astrochemistry Astrochemistry.eu, maintained by Guido W. Fuchs, serves as a collaborative hub for researchers in astrophysics and astrochemistry, covering observational, laboratory, and theoretical investigations of interstellar chemistry. Visitors can find featured news on prize-winning discoveries, upcoming conferences, job opportunities, and curated links to major databases, journals, and research networks worldwide.
2026-07-07 Astrofotografie von Sebastian Voltmer Sebastian Voltmer's personal astrophotography site showcases stunning images of deep-sky objects, galaxies, nebulae, and planets captured through his telescope. The site blends scientific passion with artistic vision, featuring photos and videos of the cosmos from locations including the French Alps.
2026-07-07 Astrolabe Astronomy Club The Astrolabe Astronomy Club is a local amateur astronomy club based in Wheeling, WV, offering information on membership, meetings, and events for stargazing enthusiasts. Created by Pat Plunkett, this early-2000s club site serves as a community hub for sky watchers in the West Virginia area.
2026-07-07 AstroMag AstroMag is an informational astronomy website covering celestial bodies, space weather, gamma-ray bursts, eclipses, and deep-space phenomena in accessible language for general readers. Articles span topics from Jupiter's moons to the Kuiper Belt, making complex astronomical concepts approachable without requiring a scientific background.
2026-07-07 Astrometry and Celestial Mechanics - Astrometry.org - Istituto Scientia Astrometry.org is an educational resource by Istituto Scientia dedicated to popularizing astrometry and celestial mechanics, two of astronomy's oldest classical branches. Visitors can explore topics like star positions, orbital mechanics, the SAO star catalog, and an online planetarium, with historical context tracing these sciences from ancient Greece through Galileo and Newton.
2026-07-07 Astronomers - The Night Sky This Month A comprehensive amateur astronomy resource covering the monthly night sky, planetary facts, eclipse details, Messier objects, telescope guides, and an astro dictionary for beginners. The site also extends into amateur radio with club listings, beginner guides, and rally information with GPS postcodes.
2026-07-07 Astronomiae Historia / History of Astronomy Hosted at the University of Bonn's Argelander Institute for Astronomy, this long-running site by Wolfgang R. Dick serves as a curated hub for the history of astronomy, linking to resources on history of science, notable events like the Simon Marius symposium, and the Working Group for the History of Astronomy. Created in 1995 and maintained for decades, it bridges academic astronomy with historical scholarship in both English and German.
2026-07-07 Astronomical & Nightscape Photography by Chris Cook Chris Cook's extensive astrophotography portfolio spans nearly four decades of celestial imaging, featuring deep sky objects, comets, eclipses, auroras, and stunning nightscape photography captured on both film and digital equipment. With NASA APOD features, astrophotography workshops, and a vast archive organized by technique and subject, this is a remarkable showcase of dedication to the craft.