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hubblesite.org

Hubble Space Telescope - NASA Science

Last scanned Aug 1, 2026, 11:00 PM · 11 views

91

Overall score

Excellent

Summary

From the planets in our solar system to the far reaches of the cosmos, explore NASA's Hubble Space Telescope's three decades of discoveries. This website uses WordPress. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores good (85/100) and performance excellent (90/100). Top issue: robots.txt not found.

From the planets in our solar system to the far reaches of the cosmos, explore NASA's Hubble Space Telescope's three decades of discoveries.

Top issues to fix

5 issues found · 1 high priority

  • Missing Content-Security-Policy header

    Security

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

  • Missing X-Content-Type-Options header

    Security

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

  • robots.txt not found

    SEO

    Publish /robots.txt with a Sitemap: directive to guide crawlers.

  • sitemap.xml not found

    SEO

    Publish an XML sitemap and reference it from robots.txt to speed up page discovery.

  • 20 broken links on the page

    SEO

    Fix or remove broken links — they waste crawl budget and erode user trust.

90

SEO

2 issue(s) found

90

Performance

369 ms

85

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

0 overall since Jul 25, 2026

Overall
91
SEO
90
Security
85
Performance
90
Accessibility
100

Organization

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

From the planets in our solar system to the far reaches of the cosmos, explore NASA's Hubble Space Telescope's three decades of discoveries.

FacebookX (Twitter)InstagramFacebookInstagramX (Twitter)YouTube

Meta tags

Title
Hubble Space Telescope - NASA Science
Description
From the planets in our solar system to the far reaches of the cosmos, explore NASA's Hubble Space Telescope's three decades of discoveries.
Canonical
https://science.nasa.gov/mission/hubble/
Language
en-US
Charset
UTF-8
Viewport
width=device-width, initial-scale=1
Robots meta
follow, index, max-snippet:-1, max-video-preview:-1, max-image-preview:large
Manifest
https://science.nasa.gov/wp-content/plugins/nasa-hds-core-setup/assets/favicons/site.webmanifest

OpenGraph & Twitter Card

OpenGraph

og:title
Hubble Space Telescope - NASA Science
og:description
From the planets in our solar system to the far reaches of the cosmos, explore NASA's Hubble Space Telescope's three decades of discoveries.
og:type
article
og:url
https://science.nasa.gov/mission/hubble/

Twitter Card

twitter:card
summary_large_image
twitter:title
Hubble Space Telescope - NASA Science
twitter:description
From the planets in our solar system to the far reaches of the cosmos, explore NASA's Hubble Space Telescope's three decades of discoveries.

Technologies

Detected frameworks, languages, and tools.

ReactWordPressjQueryNginx

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
Let's Encrypt
Subject
science.nasa.gov
Valid from
Jun 30, 2026
Valid to
Sep 28, 2026
Days until expiry
57
SAN domains
science.nasa.gov

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 9 · H3 88

Links

149 internal · 110 external · 20 broken

Images

76 total · 0 missing alt

Scripts / Styles

56 scripts · 8 stylesheets

JS / CSS size

15.8 KB · 41.8 KB

Page size

387 KB

Robots.txt & Sitemap

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

SEO issues

  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://hubblesite.org
Final URL
https://science.nasa.gov/mission/hubble/
HTTP status
200
HTTP version
HTTP/2
Response time
362 ms
HTML size
387 KB
Redirect chain
https://hubblesite.org → https://science.nasa.gov/mission/hubble/

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does hubblesite.org use?
hubblesite.org is built with React, WordPress, jQuery, Nginx.
Is hubblesite.org secure (HTTPS)?
Yes. hubblesite.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 28, 2026.
Who hosts hubblesite.org?
Hosting provider information for hubblesite.org is not available yet.
What is hubblesite.org's SEO score?
hubblesite.org scored 90/100 for SEO in the latest analysis (excellent).
What is hubblesite.org's overall website score?
hubblesite.org has an overall SiteGraph score of 91/100, combining SEO, performance, security, and accessibility.
Has hubblesite.org's score changed over time?
hubblesite.org's overall score has stayed steady at 91/100 since Jul 25, 2026.