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nrao.edu

National Radio Astronomy Observatory – Revealing the Hidden Universe

Last scanned Aug 2, 2026, 3:00 AM · 23 views

76

Overall score

Fair

Summary

The public page for the National Radio Astronomy Observatory (NRAO). This website uses WordPress. SEO is good (75/100) and accessibility is good (75/100). Security scores fair (65/100) and performance excellent (90/100). Top issue: Title longer than 60 characters.

The public page for the National Radio Astronomy Observatory (NRAO). Find info related to radio astronomy and the efforts of the observatory.

Top issues to fix

10 issues found · 3 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • No H1 heading found

    SEO

    Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • Title longer than 60 characters

    SEO

    Shorten the title to under 60 characters so search results don't truncate it.

+4 more issues — details in the sections below.

75

SEO

4 issue(s) found

90

Performance

1.82 s

65

Security

HTTPS & header checks

75

Accessibility

2 issue(s) found

Score history

+1 overall since Jul 26, 2026

Overall
76
SEO
75
Security
65
Performance
90
Accessibility
75

Organization

Company details published in this site's own structured data.

The public page for the National Radio Astronomy Observatory (NRAO). Find info related to radio astronomy and the efforts of the observatory.

FacebookX (Twitter)InstagramYouTube

Meta tags

Title
National Radio Astronomy Observatory – Revealing the Hidden Universe
Description
The public page for the National Radio Astronomy Observatory (NRAO). Find info related to radio astronomy and the efforts of the observatory.
Canonical
https://public.nrao.edu/
Language
en-US
Charset
Viewport
width=device-width,initial-scale=1
Robots meta
index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
NRAO Public Site - National Radio Astronomy Observatory
og:description
The public page for the National Radio Astronomy Observatory (NRAO). Find info related to radio astronomy and the efforts of the observatory.
og:type
website
og:url
https://public.nrao.edu/

Twitter Card

twitter:card
summary
twitter:title
NRAO Public Site
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

PHPWordPressWooCommercejQueryApache

Hosting & CDN

Hosting provider
—
CDN provider
—
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Sectigo Limited
Subject
*.nrao.edu
Valid from
Apr 15, 2026
Valid to
Oct 30, 2026
Days until expiry
89
SAN domains
*.nrao.edu, nrao.edu

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 6 · H3 2

Links

60 internal · 14 external · 20 broken

Images

38 total · 12 missing alt

Scripts / Styles

54 scripts · 17 stylesheets

JS / CSS size

9.8 KB · 15.8 KB

Page size

101 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Title longer than 60 characters
  • No H1 heading found
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • More than 20% of images are missing alt text
  • No H1 heading found

Scan details

Requested URL
https://nrao.edu
Final URL
https://public.nrao.edu
HTTP status
200
HTTP version
HTTP/2
Response time
1.82 s
HTML size
101 KB
Redirect chain
https://nrao.edu → https://www.nrao.edu/ → https://public.nrao.edu

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does nrao.edu use?
nrao.edu is built with PHP, WordPress, WooCommerce, jQuery, Apache.
Is nrao.edu secure (HTTPS)?
Yes. nrao.edu uses TLS 1.3 with a certificate issued by Sectigo Limited, valid until Oct 30, 2026.
Who hosts nrao.edu?
Hosting provider information for nrao.edu is not available yet.
What is nrao.edu's SEO score?
nrao.edu scored 75/100 for SEO in the latest analysis (fair).
What is nrao.edu's overall website score?
nrao.edu has an overall SiteGraph score of 76/100, combining SEO, performance, security, and accessibility.
Has nrao.edu's score changed over time?
nrao.edu's overall score has improved by 1 point (from 75 to 76) since Jul 26, 2026.