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Our Solar Siblings – Exploring Stars, Galaxies and our Home in the Universe: An Evidence-Based Astronomy Education Programme. — 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 ↗	66 match 1 shared topics	Colorado Springs Astronomical Society – Education + Science + Star Parties + Star Viewings + Star Programs	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
ayrastro.com ↗	66 match 1 shared topics	Ayrshire Astronomical Society- Explore the universe with us	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
lunarclubhouse.com ↗	66 match 1 shared topics	Lunar Clubhouse: Space Exploration and Astronomy Blog	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
3dastronomer.net ↗	65 match 1 shared topics	3D Astronomer, Space Exploring The Cosmos, Stars or Outer Space.	en	space-and-astronomy Weebly	robotsllmsaihumans	emailphone	none
awesome-universe.com ↗	65 match 1 shared topics	Our Awesome Universe – Learning more about our place in the universe…	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
urban-astronomer.com ↗	65 match 1 shared topics	Urban Astronomer – Making sense of the universe one page at a time	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 13
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
7jilievo.com ↗	64 match 1 shared topics	jilievo \| Explore the mysteries of the universe with innovative insights and discoveries.	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
lunarboom.com ↗	64 match 1 shared topics	Home \| LunarBoom — Stargazing & Astronomy Experiences	en	space-and-astronomy	robotsllmsaihumans	emailphone	partial · 8
3ap.org ↗	64 match 1 shared topics	Amateur Astronomers Association of Pittsburgh – Your Bridge to the Stars	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 8
deep24.org ↗	64 match 1 shared topics	\| Beyond the edge of the Universe: latest results from the deepest astronomical surveys \|	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
nasa-explorer.com ↗	64 match 1 shared topics	NASA Space Explorer - Discover the Universe	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
cuas.org ↗	64 match 1 shared topics	Champaign-Urbana Astronomical Society – Science, Education, Community, Fun	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
usastronomy.com ↗	64 match 1 shared topics	US Astronomy — Space Science, Cosmic Exploration & Astrophysics \| USAstronomy.com	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
crystalpalacespace.com ↗	64 match 1 shared topics	Crystal Palace Space: Exploring Astronomy, Space Tech & Cosmic Discoveries	US~ en	space-and-astronomy	robotsllmsaihumans	emailphone	none
csgazers.org ↗	64 match 1 shared topics	Community Stargazers \| Discovering the Wonders of the Universe — Join Today	en	space-and-astronomy Squarespace Magento	robotsllmsaihumans	emailphone	none
astrowombat.com.au ↗	64 match 1 shared topics	AstroWombat \| Wonders of the Universe	AU 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.