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National Security Space Association – Dedicated to the National Security Space enterprise — 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
spacetradeassociation.com ↗	67 match 1 shared topics	The Space Trade Association – Currently Inactive	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
spacecityhq.com ↗	67 match 1 shared topics	International Space City HQ – Shape the future of space	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
spaceforcesassociation.org ↗	66 match 1 shared topics	Home - Space Force Association	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
acsp.space ↗	66 match 1 shared topics	Association of Commercial Space Professionals	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
space-hub.org ↗	66 match 1 shared topics	SPACE HUB International Ecosystem of Space Engineers	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spacecert.org ↗	66 match 1 shared topics	SpaceCert.org – Space industry certification for the next generation	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 8
spaceops2027.org ↗	66 match 1 shared topics	SpaceOps 2027 Munich – International Conference on Space Operations	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
spacesong.org ↗	65 match 1 shared topics	The Space Song Foundation - The Space Song Foundation	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
3ap.org ↗	65 match 1 shared topics	Amateur Astronomers Association of Pittsburgh – Your Bridge to the Stars	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 8
space-debris-remediation.com ↗	65 match 1 shared topics	Space Debris Remediation – GLYCAN SPACE XR HELIOTORR LLC	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
alalfiya.space ↗	65 match 1 shared topics	Al Alfiya Space \| Advancing Space Education in the UAE	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
space-registry.org ↗	65 match 1 shared topics	Home - International Space Registry	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
africaspaceworkshops.blog ↗	65 match 1 shared topics	Africa Space Workshops – Further advancing the development of African space expertise, inclusivity, and cooperation in the international arena.	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
2bcom.space ↗	65 match 1 shared topics	2BCOM Space – Solutions for the Space Industry	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
spaceecovision.org ↗	65 match 1 shared topics	Space EcoVision — Measuring the space economy	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
space2101.com ↗	65 match 1 shared topics	Space 2101 – What will space exploration look like in the year 2101?	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
spacestationmultiverse.com ↗	65 match 1 shared topics	Space Station Multiverse – Your Space Station Travel Agency	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
spacescienceadventures.com ↗	65 match 1 shared topics	Space Science Adventures – Bringing Space and Science to the classroom	en	space-and-astronomy WordPress	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.