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Operationhelios alternatives & similar sites

Operation Helios | Stratospheric Imaging Project — 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
toptica-projects.com ↗	64 match 1 shared topics	Home - TOPTICA Projects	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
blackbrant2.com ↗	64 match 1 shared topics	Black Brant Project - Home	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
acnet.ovh ↗	63 match 1 shared topics	KESTREL Program — Mission in preparation	en	space-and-astronomy	robotsllmsaihumans	emailphone	partial · 8
virtualtelescope.eu ↗	63 match 1 shared topics	Home - The Virtual Telescope Project 2.0	European Union en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
launcher.org ↗	63 match 1 shared topics	Unlocking the Power of Space Exploration at Launcher	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
tothemoonproject.com ↗	63 match 1 shared topics	To The Moon Project – Stand our from the crowd!	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
lunexp.com ↗	63 match 1 shared topics	LunExp – Lunar Exploration Company	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
aac-clyde.space ↗	62 match 1 shared topics	AAC Clyde Space \| Space Data & Satellite Constellation Providers	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
aac-clyde.space ↗	62 match 1 shared topics	AAC Clyde Space \| Space Data & Satellite Constellation Providers	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
3vec.com ↗	62 match 1 shared topics	blazing-chromosphere	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
acsp.space ↗	62 match 1 shared topics	Association of Commercial Space Professionals	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
copernicusautomation.com ↗	62 match 1 shared topics	Copernicus Automation - Remote Observatory Control Systems \| CRM-144-S	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
blueplanetprojectband.com ↗	62 match 1 shared topics	BLUEPLANETPROJECT – "Look for what others don't see"	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
touristtelescopes.com ↗	62 match 1 shared topics	Tourist Telescopes \| Coin operated Telescope \| Coin operated Binocular \| Seaside Telescope	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
backbearing.com ↗	62 match 1 shared topics	Backbearing. Astronavigation Resources.	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
copy-over.com ↗	62 match 1 shared topics	COPY, OVER — Your Cosmic Relay Station \| SETI Radio Signal Explorer	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
0gsim.live ↗	62 match 1 shared topics	Zero Gravity Project – The speed of light, the final frontier, to boldly go where no man has gone before.	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
copernisis.com ↗	62 match 1 shared topics	The Copernisis, based on the De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres) the seminal work on the heliocentric theory of the Renaissance astronomer Nicolaus Copernicus (1473�1543)	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.