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Aliencountdown alternatives & similar sites

Alien Countdown — 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
bloodmoon.fyi ↗	68 match 1 shared topics	Blood Moon Countdown - September 7, 2025	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
laalienhunters.com ↗	66 match 1 shared topics	L.A. ALIEN HUNTERS	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
rocketrune.com ↗	66 match 1 shared topics	RocketRune — Live Rocket Launch Tracker & Countdown	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
cybernovanft.art ↗	64 match 1 shared topics	Cyber Nova \| Next-Gen Alien Civilization	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
dontblamethealiens.com ↗	63 match 1 shared topics	Don't Blame The Aliens	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
anunnakistarseed.space ↗	62 match 1 shared topics	Alien Experiencer ~ My conversation with the stars.	en	space-and-astronomy WordPress WooCommerce	robots llmsaihumans	emailphone	none
bluealien.net ↗	62 match 1 shared topics	Blue Alien® Network – The Hive	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
armagh.space ↗	62 match 1 shared topics	Armagh Observatory & Planetarium \| County Armagh \| Northern Ireland	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 8
acubedsf.com ↗	62 match 1 shared topics	Space&Aliens \| My favorite things to write about	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
apollo13incontext.blog ↗	62 match 1 shared topics	Apollo 13 in Context	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
bookofalien.life ↗	62 match 1 shared topics	BOOK OF ALIENS — $UFOLOGY · Knowledge Is Out There	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
analiens.blog ↗	61 match 1 shared topics	An Aliens Blog – I am an alien visiting Earth. I will be writing my experiences and adventures here as a blog.	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
jcrocket.net ↗	61 match 1 shared topics	John Coker's Rockets and Rocketry	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
jcrocket.org ↗	61 match 1 shared topics	John Coker's Rockets and Rocketry	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
aciqra.com ↗	61 match 1 shared topics	Aciqra download \| SourceForge.net	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
tunispacedays.com ↗	61 match 1 shared topics	TuniSpace Days by Tunisian Space Agency \| Launch your dreams	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
labrynthe.com ↗	61 match 1 shared topics	Labrynthe - Astronomy & Space Science Courses For Students	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
rmastro.com ↗	61 match 1 shared topics	Roper Mountain Astronomers - RMA Home	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.