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Existenceunknown alternatives & similar sites

Existence Unknown — 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
amostech.com ↗	63 match 1 shared topics	AMOS Conference - AMOS Conference	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
agistockbroker.com ↗	63 match 1 shared topics	Super Intelligence \| The Future is Here \| Byte.Online	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
theufotimes.com ↗	63 match 1 shared topics	TheUFOTimes — UFO News, UAP Disclosure & Ancient Mysteries	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
theuniverseepisodes.com ↗	63 match 1 shared topics	The Universe Episodes \| Cosmic Chronicles	United States~ en	space-and-astronomy WordPress WooCommerce	robots llmsaihumans	emailphone	none
adass.org ↗	63 match 1 shared topics	ADASS Conference Series	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
4spacescience.com ↗	63 match 1 shared topics	4SpaceScience -- Search Space Science Data, News, Tools	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
aiaa-uh.com ↗	63 match 1 shared topics	AIAA University of Houston	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
jamiemollins.com ↗	63 match 1 shared topics	small science Big Adventures	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
galaxilab.com ↗	63 match 1 shared topics	GALAXI - GISTDA’s Aerospace Laboratory of eXcellence and Innovation	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
dravexis.info ↗	62 match 1 shared topics	FIRST LIGHT — UAP Discovery Platform	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
mars-exp.com ↗	62 match 1 shared topics	Mars Experience — Become an astronaut for an afternoon · Prague	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
siriusfun.org ↗	62 match 1 shared topics	Sirius Fun – Adventure recreation with a purpose	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
situsmaha168.com ↗	62 match 1 shared topics	Maha168 - Astrohackweek Event Astronomi dan Data Science untuk Peneliti Modern	en	space-and-astronomy Shopify	robotsllmsaihumans	emailphone	none
janosburg.net ↗	62 match 1 shared topics	Jan Osburg's Website	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
adamboylston.com ↗	62 match 1 shared topics	A. Boylston	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
theufoplanet.com ↗	62 match 1 shared topics	The UFO Planet - Radar UFO Map	en	space-and-astronomy WordPress WooCommerce	robots llmsaihumans	emailphone	none
atlasoftheuniverse.com ↗	62 match 1 shared topics	An Atlas of The Universe	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
1ntelligence.net ↗	62 match 1 shared topics	1ntelligence	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.