eso.org
ESO
Last scanned Jul 25, 2026, 6:25 AM · 4 views
Overall score
Great
Summary
ESO, European Organisation for Astronomical Research in the Southern Hemisphere. This website uses Nginx hosted on UNSPECIFIED - European Southern Observatory, DE. SEO is good (75/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance good (80/100). Top issue: Missing canonical link.
ESO, European Organisation for Astronomical Research in the Southern Hemisphere
- Germany
- Hosted on UNSPECIFIED - European Southern Observatory, DE
Top issues to fix
9 issues found · 1 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
1 cookie without Secure/HttpOnly flags
SecuritySet Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.
Missing canonical link
SEOAdd <link rel="canonical"> so search engines know which URL variant to index.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
+3 more issues — details in the sections below.
SEO
4 issue(s) found
Performance
1.61 s
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Organization
Company details published in this site's own structured data.
Contact
Email, phone, and address published on this site's own pages.
- information@eso.org
Meta tags
- Title
- ESO
- Description
- ESO, European Organisation for Astronomical Research in the Southern Hemisphere
- Canonical
- Language
- en
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- index,follow
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- UNSPECIFIED - European Southern Observatory, DE
- CDN provider
- —
- IP address
- 134.171.75.1
- ASN
- AS2117 (UNSPECIFIED - European Southern Observatory, DE)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME |
|
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.2
- Issuer
- Hellenic Academic and Research Institutions CA
- Subject
- www.eso.org
- Valid from
- Oct 8, 2025
- Valid to
- Oct 8, 2026
- Days until expiry
- 75
- SAN domains
- www.eso.org, cms-author2i.hq.eso.org, astronet.sc.eso.org, next.eso.org, aaboard.eso.org, cms-pdispatch2.hq.eso.org, cms-pdispatch2i.hq.eso.org, cms-author.hq.eso.org, cms-publish2.hq.eso.org, w4.hq.eso.org, duo.eso.org, duo2020.eso.org, esoads.eso.org, demo.eso.org, groupware.eso.org, messenger.eso.org, wwwi.eso.org, cms-adispatchi.hq.eso.org, cms-author1.hq.eso.org, cms-pdispatch1i.hq.eso.org, pmpd.eso.org, usersupport.eso.org, almasw.hq.eso.org, cms-adispatch1i.hq.eso.org, cms-author1i.hq.eso.org, w2n.hq.eso.org, w4n.hq.eso.org, cms-publish.hq.eso.org, cms-pdispatchi.hq.eso.org, w1ni.hq.eso.org, cms-pdispatch.hq.eso.org, media.eso.org, cms-adispatch.hq.eso.org, elt.eso.org, cms-adispatch1.hq.eso.org, pensioners.eso.org, elti.hq.eso.org, cms-adispatch2i.hq.eso.org, w1n.hq.eso.org, mailman.hq.eso.org, cms-pdispatch1.hq.eso.org, www.hq.eso.org, cms-publish2i.hq.eso.org, cms-publish1.hq.eso.org, cms-adispatch2.hq.eso.org, wwwfo.eso.org, elti.eso.org, wwwi.hq.eso.org, cms-publish1i.hq.eso.org, bienestar.eso.org, eso.org, cms-author2.hq.eso.org, w2ni.hq.eso.org
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 5 · H2 5 · H3 0
Links
295 internal · 22 external · 1 broken
Images
23 total · 2 missing alt
Scripts / Styles
4 scripts · 2 stylesheets
JS / CSS size
654 KB · 422 KB
Page size
186 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 69
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing canonical link
- Multiple H1 headings found
- No structured data (JSON-LD) found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Careers
| Role | Location | Posted |
|---|---|---|
| International English | — | — |
| Employment Conditions | — | — |
| International Staff Members | — | — |
| Paid Associates | — | — |
Scan details
- Requested URL
- https://eso.org
- Final URL
- https://www.eso.org/public/
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 1.61 s
- HTML size
- 186 KB
- Redirect chain
- https://eso.org → https://www.eso.org/public/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does eso.org use?
- eso.org is built with Django, Nginx.
- Is eso.org secure (HTTPS)?
- Yes. eso.org uses TLS 1.2 with a certificate issued by Hellenic Academic and Research Institutions CA, valid until Oct 8, 2026.
- Who hosts eso.org?
- eso.org is hosted on UNSPECIFIED - European Southern Observatory, DE.
- What is eso.org's SEO score?
- eso.org scored 75/100 for SEO in the latest analysis (fair).
- What is eso.org's overall website score?
- eso.org has an overall SiteGraph score of 81/100, combining SEO, performance, security, and accessibility.
- Is eso.org hiring?
- Yes. eso.org has 4 open roles listed on their careers page.
OpenGraph & Twitter Card
OpenGraph
Twitter Card