2026-07-07 Sirius Lookers – Sedona Arizona Astronomy – Sedona Arizona Astronomy Club Sirius Lookers is a free, dues-free amateur astronomy club based in Sedona, Arizona, welcoming anyone with an interest in looking up at the night sky. The site lists monthly meeting schedules at the Sedona Public Library, upcoming star parties, viewing locations, moon phases, and links to dark sky resources and other astronomy clubs.
2026-07-07 Skokie Valley Astronomers Home: The Skokie Valley Astronomers was a beloved Illinois-based amateur astronomy club that ran for over 50 years, hosting public meetings, presentations, and events dedicated to stargazing and sky watching. The site serves as a farewell archive and resource hub, featuring newsletters, images, and links to other local astronomy clubs for members and enthusiasts to continue their passion.
2026-07-07 Skymaps.com - Publication Quality Sky Maps & Star Charts Skymaps.com, created by Kym Thalassoudis, offers free monthly sky maps and star charts in PDF format to help amateur and professional skywatchers explore constellations, planets, and comets. The site also features a curated store with planispheres, star atlases, telescopes, and astronomy books for all skill levels.
2026-07-07 skytour Wes's astronomy hub, active since 1995, offers a rich collection of observing logs, sketch galleries, comet documentation, meteor shower reports, and essays drawn from decades of visual astronomy with a 10-inch Dobsonian telescope. Highlights include extensive Oregon Star Party trip reports spanning nearly two decades, comet scrapbooks for Hale-Bopp and Hyakutake, and thoughtful amateur astronomy essays that range from beginner telescope guides to celestial measurement explanations.
2026-07-07 SMAS Home Page The Southern Maryland Astronomical Society (SMAS) is an amateur astronomy club that meets twice monthly at the Nanjemoy Creek Observatory in southern Maryland, home to a Celestron CGE 1400 Schmidt-Cassegrain 14-inch telescope. Members range from beginners to seasoned observers with decades of experience, and the club welcomes donations and new members to support its nonprofit mission.
2026-07-07 Solar System Live Solar System Live is an interactive web orrery created by John Walker that lets visitors visualize the entire solar system or inner planets at any date, time, and viewpoint they choose. Users can track asteroids and comets using orbital elements, generate custom star maps, and save personalized configurations as bookmarks, making it a genuinely useful tool for amateur and serious astronomers alike.
2026-07-07 Solar Terrestrial Dispatch Solar Terrestrial Dispatch is a 36-year-old space weather service offering near real-time auroral activity mosaics, solar wind data, X-ray flux readings, and experimental flare prediction heatmaps updated every two minutes. Visitors can track geomagnetic conditions, monitor the electrical power grid demand, and view stunning satellite imagery of aurora activity over both hemispheres.
2026-07-07 SolarSailWiki SolarSailWiki is a community-edited wiki dedicated entirely to solar sail spacecraft, covering the science of light pressure, mission histories, technologies, and future applications for propellantless space travel. With sections on design, real-world missions like the Planetary Society's LightSail, books, papers, and conferences, it serves as a comprehensive reference for anyone fascinated by this elegant form of space propulsion.
2026-07-07 Sostrata's Personal Page Elia Rowan's personal site is a rich mix of worldbuilding and space enthusiasm, featuring original fictional universes, a Kerbal Space Program journal, and a playful page about Venus alongside creative writing projects. The site has a distinctly old-web feel with hundreds of collected blinkies, stamps, and web badges alongside deep speculative content about the structure of imagined cosmologies.
2026-07-07 South Shore Astronomical Society The South Shore Astronomical Society is a community astronomy club bringing together stargazers and space enthusiasts in the South Shore region. This appears to be the club's official web presence, serving as a hub for members and those interested in joining a local astronomical society.
2026-07-07 Space and Astronomy Links Compiled by Vincent Needham at Kansas State University, this extensive link directory covers virtually every corner of space and astronomy on the web, from advocacy groups and industry players to SETI projects and digital sky surveys. With over 270 curated links organized into categories like amateur rocketry, space missions past and future, telescopes, and planetary science, it serves as a thorough reference hub for space enthusiasts and researchers alike.
2026-07-07 Space Archive - The Southwest's Source for Regional Space Information Space Archive, maintained by Brian Webb since 2000, is a comprehensive regional resource covering space and astronomy for the American Southwest, with a particular focus on Vandenberg Space Force Base rocket and missile launches including schedules, viewing guides, launch history, and multimedia. The site also features astrophotography tips, suburban astronomy guides, dark sky sites, and over two decades of archived space and astronomy news.
2026-07-07 Space Index The faqs.org Space Index is a comprehensive archive of Usenet FAQs dedicated to astronomy and space topics, covering everything from acronyms and data sources to how to become an astronaut and controversial space questions. Maintained across dozens of indexed documents, it serves as a structured reference hub for space enthusiasts and researchers seeking archived FAQ documents from the early internet era.
2026-07-07 Space Weather by SolarHam SolarHam is a comprehensive real-time space weather monitoring hub, tracking solar flux indices, sunspot regions, geomagnetic forecasts, CME activity, and X-ray data from sources like NOAA, SOHO, and STEREO. Packed with live imagery, solar wind feeds, and 3-day geomagnetic outlooks, it serves as an essential reference for amateur radio operators, aurora chasers, and space weather enthusiasts alike.
2026-07-07 Spaceflight Now | Breaking News | Proof found for gamma-ray burst in Milky Way Spaceflight Now is a dedicated space news outlet covering breaking stories from NASA missions, rocket launches, and astronomical discoveries, including this article presenting evidence of a gamma-ray burst within the Milky Way galaxy. The site features premium video content covering events like the Cassini Saturn arrival, Mars rover updates, and Hubble Space Telescope news, making it a rich hub for space enthusiasts and science followers.
2026-07-07 Spaceship Design A work-in-progress book project aimed at giving science fiction authors and scriptwriters the real engineering and physics knowledge needed to design plausible spacecraft. The site outlines chapter topics ranging from propulsion systems and structures to weapons and re-entry, covering everything from chemical rockets to theoretical Alcubierre warp drives.
2026-07-07 Spectra Jim Kaler's comprehensive guide to stellar spectra covers everything from absorption and emission lines to the Doppler effect and spectral classification, all richly illustrated with images of rainbows, nebulae, and spectrograms. Part of Kaler's broader STARS educational project hosted at the University of Illinois, this deep-dive reference explains how astronomers decode the physical and chemical nature of stars through the light they emit.
2026-07-07 Spectral Types A detailed reference table from a university astronomy course listing spectral types of stars across main sequence, giant, and supergiant classifications, with corresponding temperature, absolute magnitude, luminosity, and mass values. Covering everything from scorching O5 stars down to cool T8 brown dwarfs, this page serves as a compact but comprehensive stellar classification resource for students and enthusiasts alike.
2026-07-07 Springfield STARS – Amateur Astronomy in Western Mass The Springfield STARS is an amateur astronomy club based in Western Massachusetts, holding monthly meetings at the Springfield Science Museum from September through May. Visitors can find astronomy articles, outreach events, and club meeting details, making it a welcoming hub for stargazers in the region.
2026-07-07 Star in a Box Star in a Box is an interactive educational tool from Las Cumbres Observatory that lets you animate and explore the full lifecycle of stars across a range of solar masses using the famous Hertzsprung-Russell diagram. Visitors can watch how a star's brightness, size, surface temperature, and mass evolve over billions of years, with downloadable data tables for independent investigation.
2026-07-07 Star Light, Star Bright ... Stars Fanlisting Star Light, Star Bright is a TFL-network fanlisting dedicated to stars, inviting fans from around the world to add their names to a growing list of 647 members who share a love of stargazing. Run by Melanie, the site is a simple but charming tribute to the beauty of the night sky.
2026-07-07 Star Shadows Remote Observatory Home Page Star Shadows Remote Observatory (SSRO) was a cooperative astro-imaging venture cofounded by Rick Gilbert, Jack Harvey, Steve Mandel, and John Pierce, producing deep-sky images from New Mexico and Cerro Tololo Inter-American Observatory in Chile from 2004 to 2018. The archived site offers access to their gallery, equipment details, and documents from over a decade of collaborative astrophotography.
2026-07-07 StarChild A Learning Center for Young Astronomers: StarChild is NASA's Goddard Space Flight Center educational resource designed to introduce young astronomers ages 5-13 to the solar system, the Milky Way, and the broader universe. Organized into two skill levels, the site covers topics from comets and black holes to galaxies and space terminology, making complex astronomical concepts accessible to children.
2026-07-07 StarryWonders Astrophotography Steve Cannistra's StarryWonders is a deep-dive into astrophotography, featuring stunning CCD images of nebulae and galaxies alongside detailed technical guides on subexposure time, binning, CCD cooling analysis, and bicolor Ha/OIII processing. The site is a treasure trove for serious amateur astronomers, combining a rich image gallery with spreadsheets and tutorials that go well beyond typical hobbyist pages.
2026-07-07 start [NEKAAL] NEKAAL (Northeast Kansas Amateur Astronomers' League Inc.) is the official site for an astronomy club based in Northeast Kansas, home to the Farpoint Observatory. Visitors can find upcoming public astronomy nights, general meeting schedules, astro images, observer archives, and links to educational resources for amateur stargazers.
2026-07-07 StarWatch Moravian College Astronomy: StarWatch is a weekly astronomy column produced by Moravian College covering night sky events, star maps, moon phases, and detailed guides to constellations and celestial phenomena visible from the Lehigh Valley region. Written by Dr. Terry Pundiak, each installment combines accessible storytelling with genuine astronomical depth, covering topics from the imaging of the M87 black hole to the mechanics of Easter dating and the effects of precession on telescope alignment.
2026-07-07 Steele County Astronomical Society The Steele County Astronomical Society (SCAS) is an Owatonna, Minnesota-based astronomy club affiliated with the Astronomical League, organizing events like Messier Marathons, park viewing nights, and observatory tours. The site lists the club's annual schedule, membership information, and links to the Owatonna Clear Dark Sky Report for planning observation sessions.
2026-07-07 Stellafane Home of the Springfield Telescope Makers: Stellafane is the historic home of the Springfield Telescope Makers of Vermont, hosting one of the oldest and most celebrated amateur telescope making conventions in the world. The site offers comprehensive guides on building Dobsonian telescopes and grinding mirrors, a rich archive of convention history, an astrophoto gallery, and resources for beginners getting started in amateur astronomy.
2026-07-07 Supernova Remnant (SNR) Catalogue or Catalog of Galactic SNRs Maintained by D. A. Green at the Cavendish Laboratory in Cambridge, this is a comprehensive scientific catalogue of 310 known Galactic supernova remnants, updated through October 2024. It includes detailed listings, alternate names, summary data, and links to astrophysics literature via the ADS system, making it an essential reference for researchers and astronomy enthusiasts alike.
2026-07-07 Surveying the Galaxy | Galaxy Map Galaxy Map, created by Kevin Jardine, is a detailed scientific resource explaining how astronomers measure distances to objects within the Milky Way using parallax and related surveying techniques. The site covers exotic galactic objects like black holes, microquasars, and supernova remnants, with dedicated sections on hydrogen mapping, velocity mapping, and tools like VLBI and the Hipparcos and Gaia satellites.