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Rsacosmos alternatives & similar sites

RSA Cosmos, global leader in digital planetariums — 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
rocketplane.com ↗	66 match 1 shared topics	Rocketplane Global, Inc.	en	space-and-astronomy Wix	robots llmsaihumans	emailphone	none
armagh.space ↗	66 match 1 shared topics	Armagh Observatory & Planetarium \| County Armagh \| Northern Ireland	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 8
blueberryobservatory.com ↗	65 match 1 shared topics	Blueberry Pond Observatory - bringing Digital Astronomy to life	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
3dastronomer.net ↗	64 match 1 shared topics	3D Astronomer, Space Exploring The Cosmos, Stars or Outer Space.	en	space-and-astronomy Weebly	robotsllmsaihumans	emailphone	none
newspaceconomy.com ↗	64 match 1 shared topics	NewSpaceEconomy.com – Global Space Industry & Orbital Investment \| DomainFirm.XX	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
bookmobileplanetarium.com ↗	64 match 1 shared topics	Book Mobile Planetarium – India's Best Mobile Planetarium Show For Your School	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
bpblakley.com ↗	64 match 1 shared topics	BP Blakley – Planetary Scientist, Advocate, & Artist	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
minorplanetcenter.net ↗	64 match 1 shared topics	IAU Minor Planet Center	en	space-and-astronomy	robotsllmsaihumans	emailphone	partial · 5
minorplanetcenter.org ↗	64 match 1 shared topics	IAU Minor Planet Center	en	space-and-astronomy	robotsllmsaihumans	emailphone	partial · 5
bluewaterfamily.blog ↗	64 match 1 shared topics	Blue Water Family \| A global knowledge forum	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
boobiter.space ↗	63 match 1 shared topics	Boobiter — The Rotating Planet	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
roadtoplanetarlia.com ↗	63 match 1 shared topics	Road to planet Arlia	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
crystalpalacespace.com ↗	63 match 1 shared topics	Crystal Palace Space: Exploring Astronomy, Space Tech & Cosmic Discoveries	United States~ en	space-and-astronomy	robotsllmsaihumans	emailphone	none
gufob.com ↗	63 match 1 shared topics	Global UFO Bureau – Investigating the Global UFO Phenomenon	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
mcpstars.org ↗	63 match 1 shared topics	Merrillville Community Planetarium - Bringing the Universe to the Merrillville Schools and Northwest Indiana	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
boldsphereplanet.com ↗	63 match 1 shared topics	BoldSphere Planet: Exploring Space, Science, and Innovation	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
apex.space ↗	63 match 1 shared topics	Agile Planetary Exploration - Making the Frontier Accessible	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
minorplanets.org ↗	63 match 1 shared topics	Welcome to minorplanets.org	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.