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OG star tech – Open source astronomy tech — 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
cloudfreeastronomy.com ↗	67 match 1 shared topics	CloudFree Astronomy	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
fullofstars.co.uk ↗	67 match 1 shared topics	Full of Stars – Astronomy artwork from North Wales	United Kingdom en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
cultural-astronomy.com ↗	66 match 1 shared topics	Cultural Astronomy - Home	en	space-and-astronomy Joomla	robotsllmsaihumans	emailphone	none
csewi.org ↗	66 match 1 shared topics	The Space & Astronomy Blog	en	space-and-astronomy WordPress	robots llmsaihumans	emailphone	none
flamsteed.org.uk ↗	66 match 1 shared topics	Flamsteed Astronomy Society	United Kingdom en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
adoptastar.org ↗	66 match 1 shared topics	Nonprofit Adopt a Star - Supports Astronomy Research	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
acaoh.org ↗	66 match 1 shared topics	Astronomy Club of Akron	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
fordingbridgeastro.org.uk ↗	66 match 1 shared topics	Fordingbridge Astronomers	United Kingdom en	space-and-astronomy	robotsllmsaihumans	emailphone	none
astrocollective.co.uk ↗	66 match 1 shared topics	Astro Collective UK \| Stargazing Tips & Astronomy News	United Kingdom en	space-and-astronomy	robotsllmsaihumans	emailphone	none
astroconnect.co.uk ↗	65 match 1 shared topics	AstroConnect UK - Astronomy Blog & Stargazing Community	United Kingdom en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spacescience360.com ↗	65 match 1 shared topics	Space Science 360 \| Astronomy	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
forthimage.co.uk ↗	65 match 1 shared topics	Forthimage - amateur astronomy Edinburgh	United Kingdom en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
4astronomy.com ↗	65 match 1 shared topics	4Astronomy -- Custom Search for Astronomy Resources, Tools, and News	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
all-startelescope.com ↗	65 match 1 shared topics	All-Star Telescope Canada: Shop Astronomy, Astrophotography, Birding	en	space-and-astronomy Shopify	robots llmsaihumans	emailphone	none
antarikshnitkkr.live ↗	65 match 1 shared topics	Antariksh NIT Kurukshetra \| Space and Astronomy Club	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spacedad.net ↗	65 match 1 shared topics	Space Dad – Space, Astronomy, Rocketry, Posterity	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
spacetimewithstuartgary.com ↗	65 match 1 shared topics	Home \| Space, Astronomy & Science Podcast	en	space-and-astronomy Shopify	robotsllmsaihumans	emailphone	none
spacephotoprints.com ↗	65 match 1 shared topics	JWST Metal Prints \| Astronomy Photo Prints	en	space-and-astronomy WordPress WooCommerce	robots llmsaihumans	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.