What powers stsci.edu?
Last seen Jun 2026 · 67 technologies across 21 categories
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Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| apt | #21 | 11,500 |
| telescope hubble | #3 | 3,200 |
| space telescope | #3 | 3,200 |
| hubble telescope | #3 | 3,200 |
| hubble satellite | #4 | 2,200 |
| james webb telescope | #6 | 2,000 |
| hubble space telescope | #3 | 1,800 |
| james webb | #3 | 1,400 |
| jwst | #3 | 1,200 |
| asymptotic giant branch | #2 | 710 |
| hubble | #7 | 690 |
| hst | #6 | 500 |
| how are black holes created | #3 | 390 |
| telescope | #15 | 350 |
| what happens when 2 black holes collide | #2 | 310 |
| hubble space telescope | #9 | 270 |
| how do black holes form | #3 | 260 |
| wfirst | #3 | 190 |
| what happens when two black holes collide | #3 | 190 |
| jwst telescope | #3 | 160 |
| how many black holes are there | #3 | 160 |
| hubble space station | #3 | 140 |
| early release | #4 | 140 |
| hubble telescope | #17 | 140 |
| wfirst telescope | #4 | 130 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 68% desktop
- 31% phone
- 2% tablet
United States
India
Japan
Germany
United Kingdom
Brazil
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
7.84 / 10 · ranked #10,116 of all domains
2,363 referring domains · OpenPageRank
Search traffic
41,900 est. monthly organic visits (US)
4,323 keywords in Google's top 30
Core Web Vitals
| LCP | 2.7 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 1700 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 0.3 MB · 12 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| jwst-docs.stsci.edu | 20 |
| roman-docs.stsci.edu | 18 |
| stdatu.stsci.edu | 18 |
| archive.stsci.edu | 17 |
| outerspace.stsci.edu | 17 |
| www.stsci.edu | 15 |
| hst-docs.stsci.edu | 14 |
| spirit.stsci.edu | 14 |
| exoctk.stsci.edu | 12 |
| ullyses.stsci.edu | 12 |
| mast.stsci.edu | 10 |
| auth.mast.stsci.edu | 9 |
| hubblesource.stsci.edu | 9 |
| amazing-space.stsci.edu | 8 |
| catalogs.mast.stsci.edu | 8 |
| exo.mast.stsci.edu | 8 |
| maillist.stsci.edu | 8 |
| phangs.stsci.edu | 8 |
| rockyworlds.stsci.edu | 8 |
| hla.stsci.edu | 7 |
| mastweb.stsci.edu | 7 |
| proper.stsci.edu | 7 |
| stgms.stsci.edu | 7 |
| innerspace.stsci.edu | 6 |
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Recent changes
- detected Marionette.js Jan 2026
- detected RSS Jan 2026