How does PageSourceSearch know what spaceskills.org is built with?

From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.

How far back does the history of spaceskills.org go?

To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.

Can I see an older version of a script from spaceskills.org?

Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.

Which other websites use the same tracking IDs as spaceskills.org?

Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Site profile

spaceskills.org

Built with @panzoom/panzoom, d3-array, recaptcha, d3-sankey, d3-time-format, @hotwired/stimulus, d3-geo, d3-color, internmap, d3-format, d3-path, plausible and more. 6 pages and 10 stored files, last crawled 2026-10-03.

rank 1,875,541 28 libraries 1 identifier 18 third-party hosts 1 crawl open the site

Technologies and libraries

Recognised by fingerprinting the stored files and bundles against known releases; a version is the release the bytes match.

Library	Version	Seen
@panzoom/panzoom		2026-10-03
d3-array		2026-10-03
recaptcha		2026-10-03
d3-sankey		2026-10-03
d3-time-format		2026-10-03
@hotwired/stimulus		2026-10-03
d3-geo		2026-10-03
d3-color		2026-10-03
internmap		2026-10-03
d3-format		2026-10-03
d3-path		2026-10-03
plausible		2026-10-03
cloudflare-insights		2026-10-03
d3-time		2026-10-03
d3-hierarchy		2026-10-03
d3-interpolate		2026-10-03
d3-shape		2026-10-03
d3-selection		2026-10-03
d3-scale		2026-10-03
d3-dsv		2026-10-03
d3-fetch		2026-10-03
cash-dom		2026-10-03
lodash.clonedeep		2026-10-03
@vitest/utils	5.0.2	2026-10-03
slugify		2026-10-03
lodash.defaultsdeep		2026-10-03
@spaceskills/ssa-charts		2026-10-03
@spaceskills/ssa-design-system		2026-10-03

Tracking, tag and verification IDs

Public identifiers read out of the source. Each links to every other site in the index that carries the same one.

What	Value	Found in
reCAPTCHA site key (Google)	6LeY1wUqAAAAALiSRo24UE222jy6x8SDvl4nSXWz	view source

Third-party hosts

Hosts outside spaceskills.org that its pages load scripts, frames or stylesheets from, and that its own scripts name in absolute URLs (connect). Each links to every site loading from the same host.

Host	Loaded as	Found in
climate.nasa.gov	connect	view source
commons.wikimedia.org	connect	view source
earthobservatory.nasa.gov	connect	view source
esawebb.org	connect	view source
home.bt.com	connect	view source
images.nasa.gov	connect	view source
nssdc.gsfc.nasa.gov	connect	view source
plausible.io	script	view source
pluto.jhuapl.edu	connect	view source
purl.org	connect	view source
static.cloudflareinsights.com	script	view source
www.esa.int	connect	view source
www.eso.org	connect	view source
www.flickr.com	connect	view source
www.google.com	script	view source
www.nasa.gov	connect	view source
www.spacetelescope.org	connect	view source
www.w3.org	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 10) }. Versions are the crawls at which the file was new or its content changed; each opens the file as it was then, rebuilt from the same stored chunks.

File	Kind	Size	Collected	Versions
https://plausible.io/js/pa-pQaQCH8LLlOIWLuR1wMD4.js	js library	not fetched	2026-10-03	current
https://spaceskills.org/assets/application-f039e…351b406a23020c7d3b8642ef0d98.js	js	719.4 KB	2026-10-03	current
https://static.cloudflareinsights.com/beacon.min…85bb4c19e7a9bdbcba1788362987495	js library	not fetched	2026-10-03	current
https://www.google.com/recaptcha/enterprise.js?r…AAAALiSRo24UE222jy6x8SDvl4nSXWz	js library	not fetched	2026-10-03	current
https://spaceskills.org/census/2024	html	58.3 KB	2026-10-03	2026-10-03
https://spaceskills.org/cdn-cgi/content?id=C7ouy…rV.edX2mP.CSf5r0Xuw5NG.eczJZPcO	html	4.2 KB	2026-10-03	2026-10-03
https://spaceskills.org/about	html	30.3 KB	2026-10-03	2026-10-03
https://spaceskills.org/news	html	33.8 KB	2026-10-03	2026-10-03
https://spaceskills.org/	html	50.9 KB	2026-10-03	2026-10-03
https://spaceskills.org/cdn-cgi/content?id=qwLwB…wrSvwRZ2CGoRJnAFWs8gRRiJHCSyx_k	html	3.2 KB	2026-09-25	current

Timeline

One entry per crawl, newest first, with what changed since the crawl before: libraries, identifiers, third-party hosts and files. Historical versions stay viewable because the stored chunks are shared between versions, never copied.

2026-10-03 first crawl

5 pages, 9 files, 896.9 KB; 28 libraries, 1 identifier, 18 third-party hosts
28 libraries added
- recaptcha
- @vitest/utils 5.0.2
- slugify
- cash-dom
- lodash.defaultsdeep
- lodash.clonedeep
- @hotwired/stimulus
- @spaceskills/ssa-charts
- d3-array
- internmap
- d3-fetch
- d3-dsv
- and 16 more
1 identifier added
- 6LeY1wUqAAAAALiSRo24UE222jy6x8SDvl4nSXWz reCAPTCHA site key
18 third-party hosts added
- www.google.com
- plausible.io
- static.cloudflareinsights.com
- purl.org
- www.eso.org
- home.bt.com
- www.esa.int
- commons.wikimedia.org
- www.spacetelescope.org
- www.flickr.com
- images.nasa.gov
- www.nasa.gov
- and 6 more
9 files added

Questions about spaceskills.org

How does PageSourceSearch know what spaceskills.org is built with?: From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.
How far back does the history of spaceskills.org go?: To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.
Can I see an older version of a script from spaceskills.org?: Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.
Which other websites use the same tracking IDs as spaceskills.org?: Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Look up another site, browse sites by tracking ID, third-party host or technology. Site owners: see the crawler page for how stored pages are removed.