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Alienplanet alternatives & similar sites

Alien Planet — 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
kutsop.com ↗	65 match 2 shared topics	Nicholas W. Kutsop, Ph.D. — Planetary Scientist	United States~ en	space-and-astronomy	robotsllmsaihumans	email phone	none
kilroyonmars.co ↗	63 match 2 shared topics	Life on Mars - KilroyOnMars.com	Colombia en	space-and-astronomy Joomla	robotsllmsaihumans	emailphone	none
apai.space ↗	63 match 2 shared topics	Distant Earths – Daniel Apai's Blog on Exoplanet Exploration and Astrobiology	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
acmerocketscience.com ↗	62 match 2 shared topics	The ACME Rocket Science Company – Ideas Blasting off to Success! Coming to a Planet near you … soon!	en	science WordPress	robotsllmsaihumans	emailphone	none
black-hole-hunters.org ↗	61 match 2 shared topics	Black Hole Hunters \| Zooniverse - People-powered research	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
4hollowearth.com ↗	61 match 2 shared topics	A New Perspective of Earth's Structure	en	science	robotsllmsaihumans	emailphone	none
labinorb.com ↗	61 match 2 shared topics	Home - Labinorb	en	science WordPress	robots llmsaihumans	email phone	none
ampt.pro ↗	61 match 2 shared topics	Agile Space Industries	en	space-and-astronomy Squarespace Magento	robotsllmsaihumans	emailphone	none
vegnos.org ↗	61 match 2 shared topics	Home \| Vegnos	en	science	robotsllmsaihumans	emailphone	none
brendanpiater.com ↗	61 match 2 shared topics	brendan@work - technology and conservation	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
thegalacticmind.com ↗	61 match 2 shared topics	The Galactic Mind	en	science Ghost	robotsllmsaihumans	emailphone	none
theinfoserver.com ↗	61 match 2 shared topics	The Info Server	en	science	robotsllmsaihumans	emailphone	none
3dmesonet.org ↗	60 match 2 shared topics	3D Mesonet Project \| The 3D Mesonet Project is a cooperative effort between the University of Oklahoma and Oklahoma State University to collect spatiotemporal (3D) atmospheric measurements in the lower atmosphere through the use of small, instrumented unmanned aircraft systems (UAS). These weather-o	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
5watts.org ↗	60 match 2 shared topics	QRP and Amateur Radio by Roger J. Wendell - WB�JNR (WB0JNR)	en	science	robotsllmsaihumans	emailphone	none
1inmillion.com ↗	60 match 2 shared topics	Discover the rare phenomena at 1 in Million \| 1 in million	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
thegaialab.com ↗	60 match 2 shared topics	The Gaia Lab – Exploring landscapes across the Solar System	en	science WordPress	robotsllmsaihumans	emailphone	none
blindedbysciencepodcast.com ↗	60 match 2 shared topics	Blinded by Science – An appreciation of all things science	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 8
bracewell.science ↗	60 match 2 shared topics	Bracewell at 70	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.