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Champaign-Urbana Astronomical Society – Science, Education, Community, Fun — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Space And Astronomy →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
csastro.org ↗	70 match 1 shared topics	Colorado Springs Astronomical Society – Education + Science + Star Parties + Star Viewings + Star Programs	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
astronomy.org.au ↗	69 match 1 shared topics	Australian Astronomy – Astronomical Society of Australia	AU en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
delastro.org ↗	68 match 1 shared topics	Delaware Astronomical Society Website - Home	en	space-and-astronomy Joomla	robotsllmsaihumans	emailphone	none
astas.org.au ↗	68 match 1 shared topics	Astronomical Society Tasmania \| Astronomical	AU en	space-and-astronomy	robotsllmsaihumans	email phone	none
asv.org.au ↗	68 match 1 shared topics	Astronomical Society of Victoria Inc - Home Page	AU en	space-and-astronomy phpBB	robotsllmsaihumans	emailphone	none
aaq.org.au ↗	67 match 1 shared topics	AAQ – Astronomical Association of Qld	AU en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
ayrastro.com ↗	67 match 1 shared topics	Ayrshire Astronomical Society- Explore the universe with us	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
usastronomy.com ↗	66 match 1 shared topics	US Astronomy — Space Science, Cosmic Exploration & Astrophysics \| USAstronomy.com	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
naperastro.com ↗	65 match 1 shared topics	Naperville Astronomical Association \| Organized Amateur Astronomy	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
uranianova.com ↗	65 match 1 shared topics	Urania Nova – Astronomical facts you did not know you need	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
johnsonized.com ↗	65 match 1 shared topics	Space Art, Astronomical Art, Advanced Concept, 3D Animation, Film of B.E.Johnson	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
planetseducation.com ↗	65 match 1 shared topics	Planets Education – General knowledge of Planets, Universe and Science	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
urbanastronomy.com ↗	65 match 1 shared topics	Urban Astronomy – Staring through the light pollution since 2004	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
nationalspacesociety.com ↗	65 match 1 shared topics	NSS – The National Space Society	en	space-and-astronomy WordPress	robots llmsaihumans	emailphone	none
bas-astro.org ↗	65 match 1 shared topics	The Birmingham Astronomical Society \| Astronomy, Astrophotography, and Space Enthusiasts in Birmingham Alabama \| Birmingham, AL, USA	en	space-and-astronomy Wix	robots llmsaihumans	emailphone	none
lunac.app ↗	65 match 1 shared topics	LuNAC — Lunar Calendar & Astronomical Almanac	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
haveyouseenthisclock.com ↗	64 match 1 shared topics	The search for Rasmus Sørnes' 4th astronomical clock	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
johnnyispy.com ↗	64 match 1 shared topics	JohnnyiSpy \| Geophysical & Astronomical Data – Geophysical and Astronomical Diaries	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.