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Highflightfoundation alternatives & similar sites

High Flight Foundation - The Legacy of Astronaut Col. James B. Irwin — 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
helioarc.org ↗	66 match 1 shared topics	The HelioArc Foundation	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
futureastronaut.com ↗	65 match 1 shared topics	Future Astronaut - Explore Space From Home	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
rocketlaunchapp.com ↗	65 match 1 shared topics	RocketLaunch - The spaceflight schedule	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
donamarabe.com ↗	64 match 1 shared topics	Dona Marabe - Filipino Astronaut in the making \| Dona Marabe	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
3ap.org ↗	64 match 1 shared topics	Amateur Astronomers Association of Pittsburgh – Your Bridge to the Stars	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	partial · 8
helensharman.com ↗	64 match 1 shared topics	Helen Sharman CMG OBE: The First British Astronaut	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
helensharmanastronaut.com ↗	64 match 1 shared topics	Helen Sharman CMG OBE: The First British Astronaut	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
2funnyastronauts.com ↗	64 match 1 shared topics	2 Funny Astronauts \| 2 Funny Astronauts	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
backbearing.com ↗	64 match 1 shared topics	Backbearing. Astronavigation Resources.	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
aiaa-sf.org ↗	64 match 1 shared topics	American Institute of Aeronautics and Astronautics – San Francisco – Celebrating aerospace ingenuity and collaboration	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
aiaahouston.org ↗	64 match 1 shared topics	AIAA Houston Section \| A Section of Region IV of the American Institute of Aeronautics and Astronautics	US~ en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
abshaw.com ↗	64 match 1 shared topics	Astronauts \| mysite	en	space-and-astronomy Wix	robots llmsaihumans	emailphone	none
acastropark.com ↗	64 match 1 shared topics	Moeller Observatory \| Inspiration Through Astronomy	en	space-and-astronomy Squarespace Magento	robotsllmsaihumans	emailphone	none
cincinnatiobservatory.org ↗	63 match 1 shared topics	The Cincinnati Observatory - Birthplace of American Astronomy	en	space-and-astronomy	robotsllmsaihumans	email phone	none
3af-spacepropulsion.com ↗	63 match 1 shared topics	Home - 10th EDITION OF THE SPACE PROPULSION CONFERENCE	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
dontdieonthemoon.com ↗	63 match 1 shared topics	Don't Die On The Moon	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
christian-ginski.com ↗	63 match 1 shared topics	Christian Ginski - Astronomer	en	space-and-astronomy Squarespace Magento	robotsllmsaihumans	emailphone	none
trifidnebula.com ↗	63 match 1 shared topics	Trifid Nebula - Adventures in Amateur Astronomy	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.