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Astronomy Picture of the Day — 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
impatientastronomer.com ↗	68 match 1 shared topics	Impatient Astronomer	en	space-and-astronomy Tumblr	robotsllmsaihumans	emailphone	partial · 11
spottedclaw.com ↗	67 match 1 shared topics	Peace and Astronomy	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
spottedclaw.net ↗	67 match 1 shared topics	Peace and Astronomy	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
astronomyedinburgh.org ↗	67 match 1 shared topics	Astronomy in Edinburgh - Astronomical Society of Edinburgh	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
drogenberg.be ↗	67 match 1 shared topics	DROGENBERG – Hoegaarden Astronomy & Photography	Belgium en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
blackholepictures.com ↗	66 match 1 shared topics	Black Hole Pictures	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
bajastargazing.com ↗	66 match 1 shared topics	Baja Stargazing Tours \| Astronomy \| Los Cabos, BCS, Mexico	en	space-and-astronomy Wix	robots llmsaihumans	emailphone	none
imperialearth.com ↗	66 match 1 shared topics	Space Art, Astronomical Art, Advanced Concept, 3D Animation, Film of B.E.Johnson	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spokaneastronomical.org ↗	66 match 1 shared topics	Welcome! - Spokane Astronomical Society	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
crystalpalacespace.com ↗	66 match 1 shared topics	Crystal Palace Space: Exploring Astronomy, Space Tech & Cosmic Discoveries	United States~ en	space-and-astronomy	robotsllmsaihumans	emailphone	none
touptek-astro.com ↗	66 match 1 shared topics	ToupTek Astro \| Astronomical Camera \| Astronomy Camera	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
4astronomy.com ↗	66 match 1 shared topics	4Astronomy -- Custom Search for Astronomy Resources, Tools, and News	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
astroleveluppoint.com ↗	65 match 1 shared topics	Astro Level Up Point: Tips for Stargazing and Astronomy	United States~ en	space-and-astronomy	robotsllmsaihumans	emailphone	none
atlasoftheuniverse.com ↗	65 match 1 shared topics	An Atlas of The Universe	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
astronomics.com ↗	65 match 1 shared topics	Astronomics Scientific & Astronomical Gear	en	space-and-astronomy Shopify	robots llmsaihumans	emailphone	none
inconstantmoon.com ↗	65 match 1 shared topics	Inconstant Moon: multimedia tours of the lunar surface	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
3af-spacepropulsion.com ↗	65 match 1 shared topics	Home - 10th EDITION OF THE SPACE PROPULSION CONFERENCE	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
1norton.com ↗	64 match 1 shared topics	Chuck Norton – Citizen of the World	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.