adlerplanetarium.org
Home - Adler Planetarium
Last scanned Aug 5, 2026, 5:00 AM · 9 views
Overall score
Great
Summary
Chicago's Adler Planetarium is America's first planetarium and a premiere resource for inspiring the next generation of space explorers. This website uses WordPress behind Fastly CDN. SEO is good (85/100) and accessibility is excellent (100/100). Security scores fair (65/100) and performance good (80/100). Top issue: Multiple H1 headings found.
Chicago's Adler Planetarium is America's first planetarium and a premiere resource for inspiring the next generation of space explorers.
Top issues to fix
9 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
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.
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
3 issue(s) found
Performance
2.45 s
Security
HTTPS & header checks
Accessibility
0 issue(s) found
Score history
0 overall since Jul 27, 2026
- Overall
- 82
- SEO
- 85
- Security
- 65
- Performance
- 80
- Accessibility
- 100
Organization
Company details published in this site's own structured data.
Meta tags
- Title
- Home - Adler Planetarium
- Description
- Chicago's Adler Planetarium is America's first planetarium and a premiere resource for inspiring the next generation of space explorers.
- Canonical
- https://www.adlerplanetarium.org/
- Language
- en-US
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1, shrink-to-fit=no
- Robots meta
- index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
- Manifest
- https://www.adlerplanetarium.org/site.webmanifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- Fastly
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- Let's Encrypt
- Subject
- adlerplanetarium.org
- Valid from
- Jun 8, 2026
- Valid to
- Sep 6, 2026
- Days until expiry
- 32
- SAN domains
- adlerplanetarium.org, www.adlerplanetarium.org
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 2 · H2 7 · H3 19
Links
55 internal · 11 external · 20 broken
Images
26 total · 2 missing alt
Scripts / Styles
29 scripts · 1 stylesheets
JS / CSS size
3.1 KB · 18.1 KB
Page size
631 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Multiple H1 headings found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
No accessibility issues detected.
Scan details
- Requested URL
- https://adlerplanetarium.org
- Final URL
- https://www.adlerplanetarium.org/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 2.44 s
- HTML size
- 631 KB
- Redirect chain
- https://adlerplanetarium.org → https://www.adlerplanetarium.org/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does adlerplanetarium.org use?
- adlerplanetarium.org is built with WordPress, Google Analytics, Google Ads, Meta Pixel, Nginx.
- Is adlerplanetarium.org secure (HTTPS)?
- Yes. adlerplanetarium.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 6, 2026.
- Who hosts adlerplanetarium.org?
- Hosting provider information for adlerplanetarium.org is not available yet.
- What is adlerplanetarium.org's SEO score?
- adlerplanetarium.org scored 85/100 for SEO in the latest analysis (great).
- What is adlerplanetarium.org's overall website score?
- adlerplanetarium.org has an overall SiteGraph score of 82/100, combining SEO, performance, security, and accessibility.
- Has adlerplanetarium.org's score changed over time?
- adlerplanetarium.org's overall score has stayed steady at 82/100 since Jul 27, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card