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Sites similar to gemini.edu

Gemini alternatives & similar sites

Gemini Observatory | — 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
space.com ↗	105 match 8 shared linkers · same topic	Space.com: NASA, Space Exploration and Astronomy News	United States~ en	space-and-astronomy	robotsllmsaihumans	emailphone	none
nasa.gov ↗	61 match 12 shared linkers · same topic	NASA	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
universetoday.com ↗	118 match 8 shared linkers · same topic	Universe Today - Space and Astronomy News	en	space-and-astronomy Lightspeed	robotsllmsaihumans	emailphone	none
phys.org ↗	83 match 9 shared linkers · same topic	Phys.org - News and Articles on Science and Technology	en	science	robots llmsaihumans	emailphone	partial · 8
pbs.org ↗	31 match 9 shared linkers	PBS: Public Broadcasting Service	en	television	robotsllmsaihumans	emailphone	none
arxiv.org ↗	31 match 12 shared linkers · same topic	arXiv.org e-Print archive	en	science	robotsllmsaihumans	emailphone	none
griffithobservatory.org ↗	85 match shared topic	Griffith Observatory - Southern California’s gateway to the cosmos!	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
ccatobservatory.org ↗	85 match shared topic	CCAT Observatory	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
keckobservatory.org ↗	85 match shared topic	W. M. Keck Observatory	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
lowell.edu ↗	85 match shared topic	Lowell Observatory Flagstaff \| Pluto Discovery, Stargazing & Astronomy	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	full · 10
almaobservatory.org ↗	58 match shared topic	In search of our cosmic origins \| ALMA Observatory	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
lsst.org ↗	58 match shared topic	Rubin Observatory \| Opening a digital window for discovery of the dynamic universe.	en	space-and-astronomy Drupal	robotsllmsaihumans	emailphone	none
chaoxing.com ↗	55 match shared topic	超星	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
esa.int ↗	55 match shared topic	European Space Agency	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
hamqsl.com ↗	55 match shared topic	HF Propagation and Solar-Terrestrial Data Website	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spacetourismhq.com ↗	55 match shared topic	Space Tourism HQ LLC	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
copernicus.eu ↗	55 match shared topic	Homepage \| Copernicus	European Union en	space-and-astronomy Drupal	robotsllmsaihumans	emailphone	none
eso.org ↗	55 match shared topic	ESO	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.