What technology does lsst.org use?

lsst.org is built with PHP, Drupal, jQuery, Google Analytics, Apache.

Is lsst.org secure (HTTPS)?

Yes. lsst.org uses TLS 1.2 with a certificate issued by DigiCert Inc, valid until Dec 13, 2026.

Hosting provider information for lsst.org is not available yet.

What is lsst.org's SEO score?

lsst.org scored 55/100 for SEO in the latest analysis (fair).

What is lsst.org's overall website score?

lsst.org has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.

lsst.org

Rubin Observatory | Opening a digital window for discovery of the dynamic universe.

Last scanned Aug 24, 2026, 1:23 PM

Overall score

Fair

Summary

This website uses PHP. SEO is fair (55/100) and accessibility is good (75/100). Security scores good (80/100) and performance excellent (100/100). Top issue: Title longer than 60 characters.

Top issues to fix

10 issues found · 4 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.
Missing meta description
SEO
Add a ~150-character meta description to control your search-result snippet and lift click-through rate.
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.
Title longer than 60 characters
SEO
Shorten the title to under 60 characters so search results don't truncate it.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

+4 more issues — details in the sections below.

SEO

6 issue(s) found

100

Performance

281 ms

Security

HTTPS & header checks

Accessibility

2 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Meta tags

Title: Rubin Observatory | Opening a digital window for discovery of the dynamic universe.
Description
Canonical: https://lsst.org/
Language: en
Charset: utf-8
Viewport: width=device-width, initial-scale=1.0
Robots meta
Manifest

Technologies

Detected frameworks, languages, and tools.

PHP Drupal jQuery Google Analytics Apache

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.2
Issuer: DigiCert Inc
Subject: *.lsst.org
Valid from: May 29, 2026
Valid to: Dec 13, 2026
Days until expiry: 110
SAN domains: *.lsst.org, lsst.org

Security headers

Strict-Transport-SecurityMissing
Content-Security-PolicyMissing
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyMissing
Permissions-PolicyEnabled

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 2 · H3 0

Links

39 internal · 45 external · 19 broken

Images

8 total · 2 missing alt

Scripts / Styles

36 scripts · 4 stylesheets

JS / CSS size

8.4 KB · 3.3 KB

Page size

63.1 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
Missing meta description
No H1 heading found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://lsst.org
Final URL: https://lsst.org
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 280 ms
HTML size: 63.1 KB
Redirect chain: https://lsst.org

See something wrong on this report? Request a correction

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