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Space2101 alternatives & similar sites

Space 2101 – What will space exploration look like in the year 2101? — 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
spaceanswers.com ↗	72 match 1 shared topics	Space.com: NASA, Space Exploration and Astronomy News	United States~ en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spaceolympiadbd.com ↗	71 match 1 shared topics	Space Exploration Olympiad	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spaceexplorationcentral.com ↗	70 match 1 shared topics	Space Exploration Central	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spaceedu.org ↗	70 match 1 shared topics	SpaceEdu \| Satellite, Robots, Space exploration & Space Education	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spaceexploration92.com ↗	69 match 1 shared topics	Space Exploration » Beyond Infinity	en	space-and-astronomy WordPress WooCommerce	robotsllmsaihumans	emailphone	none
3dastronomer.net ↗	69 match 1 shared topics	3D Astronomer, Space Exploring The Cosmos, Stars or Outer Space.	en	space-and-astronomy Weebly	robotsllmsaihumans	emailphone	none
americasspace.university ↗	68 match 1 shared topics	The Future of Space Exploration \| University of Central Florida	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
spacesurgeryinstitute.com ↗	68 match 1 shared topics	Space Surgery Institute « Innovations for Space Exploration	en	space-and-astronomy WordPress	robotsllmsaihumans	emailphone	none
theinfinitechicago.com ↗	68 match 1 shared topics	Space Explorers: THE INFINITE \| Space Explorers: THE INFINITE \|…	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
theinfinitedenver.com ↗	68 match 1 shared topics	Space Explorers: THE INFINITE \| Space Explorers: THE INFINITE \|…	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
theinfinitenewyork.com ↗	68 match 1 shared topics	Space Explorers: THE INFINITE \| Space Explorers: THE INFINITE \|…	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
theinfinitesanjose.com ↗	68 match 1 shared topics	Space Explorers: THE INFINITE \| Space Explorers: THE INFINITE \|…	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spacedoc.org ↗	68 match 1 shared topics	Unlocking the Secrets of Space Exploration	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spacex.org ↗	68 match 1 shared topics	> F S X - The Foundation for Space Exploration <	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spaceinsight.org ↗	68 match 1 shared topics	Space Insight – Intelligence for the New Space Economy	en	space-and-astronomy WordPress	robots llmsaihumans	emailphone	none
rokets.com ↗	68 match 1 shared topics	Exploring the World of Space Exploration at Rokets.com	en	space-and-astronomy	robotsllmsaihumans	emailphone	none
spacestationlarkhill.com ↗	67 match 1 shared topics	Home \| Larkhill Space Station	en	space-and-astronomy Weebly Square Online	robotsllmsaihumans	emailphone	none
spacecenter.org ↗	67 match 1 shared topics	Space Center Houston \| Bringing people & space closer together	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.