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Procyon Systems – Serving the Amateur Astronomy community since 1993 — 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
britastro.com ↗	68 match 1 shared topics	British Astronomical Association – Supporting amateur astronomers since 1890	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
deepskydude.com ↗	68 match 1 shared topics	Deep Sky Dude \| Amateur astronomer and science communicator	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
deepskydiaries.com ↗	68 match 1 shared topics	Deep Sky Diaries – The journey of an amateur astronomer	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
trifidnebula.com ↗	67 match 1 shared topics	Trifid Nebula - Adventures in Amateur Astronomy	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
astroconnect.co.uk ↗	67 match 1 shared topics	AstroConnect UK - Astronomy Blog & Stargazing Community	United Kingdom en	space-and-astronomy	robotsllmsaihumans	emailphone	none
3ap.org ↗	66 match 1 shared topics	Amateur Astronomers Association of Pittsburgh – Your Bridge to the Stars	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 8
naperastro.com ↗	66 match 1 shared topics	Naperville Astronomical Association \| Organized Amateur Astronomy	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
cuas.org ↗	66 match 1 shared topics	Champaign-Urbana Astronomical Society – Science, Education, Community, Fun	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
centralcoastastronomy.org ↗	66 match 1 shared topics	Central Coast Astronomical Society – Sharing the night sky above San Luis Obispo County, California, since 1979.	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
myskydome.com ↗	66 match 1 shared topics	MySkyDome - Astronomy Forecasts for Your Observing Site	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
primalucespace.com ↗	66 match 1 shared topics	Ground station systems for SSA and space communication	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
n5ama.com ↗	65 match 1 shared topics	n5ama.com – Astronomy support	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
celestics.org ↗	65 match 1 shared topics	StarBase Celestics – The Art and Method of Forensic Astronomy	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
csewi.org ↗	65 match 1 shared topics	The Space & Astronomy Blog	en	space-and-astronomy WordPress	robots llmsaihumans	emailphone	none
millseyspages.com ↗	65 match 1 shared topics	John Mills - Astronomical, Musical and Amateur Radio website	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
frederictonastronomy.ca ↗	65 match 1 shared topics	www.FrederictonAstronomy.ca \| Sharing the skies...	Canada en	space-and-astronomy Drupal	robotsllmsaihumans	emailphone	none
aaspunjab.org ↗	65 match 1 shared topics	Amateur Astronomical Society of Punjab – I don't want to believe,I want to know. – Carl Sagan	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
deepastronomy.com ↗	65 match 1 shared topics	Original Astronomy Content - Deep Astronomy	en	space-and-astronomy	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.