Lsst.org - SEO Checker

Sign up for free! PDF Export
Overview of the SEO Check
Meta information
61% 
Page quality
32% 
Page structure
79% 
Link structure
72% 
Server
0% 
External factors
100% 
SEO Score
Response time
1.33 s
File size
62.10 kB
Words
339
Media files
6
Number of links
42 internal / 47 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Rubin Observatory | Opening a digital window for discovery of the dynamic universe.
The page title should be shorter than 580 pixels. It is 756 pixels long. Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://www.lsst.org/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
generatorDrupal 7 (https://www.drupal.org)
authorLarge Synoptic Survey Telescope
viewportwidth=device-width, initial-scale=1.0
langen
twitter:cardsummary
twitter:urlhttps://www.lsst.org/
twitter:titleRubin Observatory
twitter:descriptionOpening a digital window for discovery of the dynamic universe.
og:site_nameRubin Observatory
og:typewebsite
og:urlhttps://www.lsst.org/
og:titleRubin Observatory
og:descriptionOpening a digital window for discovery of the dynamic universe.
Content-Typetext/html; charset=UTF-8

Test up to 1.000 webpages of lsst.org with our free plan!

Try For Free
No trial. It's just free!

Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
Only 1 paragraph/s was/were found on this page.
There are only 339 words on this page. Good pages should have about 800 words of useful content.
23.3% of the text are stop words.
The page contains a listing, which indicates a good text layout.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 20.71 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
This page loads 28 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1.0" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 7 tags for this page.
Image SEO
(Somewhat important)
5 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
This page is optimized perfectly for social networks.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/sites/all/themes/edu/img/extli.pngNo alt attribute provided
/sites/all/themes/edu/img/extli.pngNo alt attribute provided
/sites/all/themes/edu/img/extli.pngNo alt attribute provided
...lt/files/Rubin-NSF-DOE Logo lockups4.pngHome
...Cerro-Pachon_2023-02-10-165251_awdr.jpegNo alt attribute provided
/sites/default/files/Funding-logos-bk.pngNo alt attribute provided

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H2 Visit Our New Site!
H2 See the Universe in action
H5 Rubin Observatory will answer some of our biggest questions about the Universe!
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are too many external links (47) on this page.

Found links on this page

LinkAttributesAnchor text
https://rubinobservatory.org/g...New window External GALLERY
https://www.lsst.org/PUBLIC & SCIENTISTS
https://project.lsst.org/External Subdomain PROJECT TEAM
https://lsstdiscoveryalliance....External DISCOVERY ALLIANCE
https://www.lsst.org/IMG-ALT Home
A-TITLE Home
https://rubinobservatory.org/a...External About
A-TITLE About
https://rubinobservatory.org/a...External History
A-TITLE History
https://rubinobservatory.org/a...External Construction Updates
A-TITLE Construction Updates
https://rubinobservatory.org/a...External Leadership
A-TITLE Leadership
https://rubinobs.org/about/cul...External Rubin Culture
A-TITLE Leadership
https://rubinobservatory.org/a...External Rubin in Chile
A-TITLE Rubin in Chile
https://rubinobservatory.org/a...External Organization
A-TITLE Organization
https://rubinobservatory.org/a...External Science Collaborations
A-TITLE Science Collaborations
https://rubinobservatory.org/a...External Funding Information
A-TITLE Funding Information
https://rubinobservatory.org/a...External Work With Us
A-TITLE Work With Us
/about/timelineProject Schedule
/about/organizationProject Organization
A-TITLE Rubin Observatory is a multi-component organization.
https://www.lsst.org/about/teamTeam
/staff-highlightsStaff Highlights
A-TITLE Staff Highlights
https://rubin.canto.com/v/Reso...External Subdomain Fact Sheets
A-TITLE Fact Sheets
/about/project-statusMonthly Updates
A-TITLE Monthly Updates
https://rubinobservatory.org/c...External Calendar
A-TITLE Calendar
https://rubin.canto.com/v/gall...External Subdomain Gallery
A-TITLE Gallery
https://rubinobservatory.org/g...External Slideshows
A-TITLE Slideshows
https://rubinobservatory.org/g...External Summit Webcam
A-TITLE Summit Webcam
https://rubin.canto.com/v/Rubi...External Subdomain Planetarium Assets
A-TITLE Planetarium Assets
https://rubinobservatory.org/e...External Explore
A-TITLE Explore
https://rubinobservatory.org/e...External Why are we named after Vera Rubin?
A-TITLE Why are we named after Vera Rubin?
https://rubinobservatory.org/e...External Legacy Survey of Space and Time (LSST)
A-TITLE Legacy Survey of Space and Time (LSST)
https://rubinobservatory.org/e...External Science Goals
A-TITLE Science Goals
https://rubinobservatory.org/e...External Observatory Site Selection
A-TITLE Observatory Site Selection
https://rubinobservatory.org/e...External Rubin Voices
A-TITLE Rubin Voices
https://rubinobservatory.org/e...External Rubin Numbers
A-TITLE Rubin Numbers
https://rubinobservatory.org/e...External Rubin Technology
A-TITLE Rubin Technology
https://rubinobservatory.org/e...External Alert Stream
A-TITLE Alert Stream
https://rubinobservatory.org/e...External Citizen Science
A-TITLE Citizen Science
https://www.lsst.org/newsNews
https://rubinobservatory.org/newsExternal Rubinobservatory.org News
A-TITLE Rubinobservatory.org News
https://www.lsst.org/newsLSST.org News
A-TITLE Lsst.org News
https://www.lsst.org/news/digestDigest
/about/project-statusText duplicate Monthly Updates
/scientists/news-deadlines-eventsProject Events
A-TITLE Project Events
/news/news-coverageIn the News
A-TITLE In the News
/news/press_releasesPress Releases
A-TITLE Press Releases
https://rubinobservatory.org/m...External For Media
A-TITLE For Media
https://www.lsst.org/scientistsFor Scientists
A-TITLE For Scientists
/scientists/science-collaborat...Text duplicate Science Collaborations
A-TITLE Science Collaborations
/scientists/support-for-scienceSupport for Science
A-TITLE Support for Science
http://community.lsst.org/External Subdomain Community Forum
A-TITLE Community Forum
/scientists/early-scienceEarly Science
A-TITLE Early Science
/scientists/survey-designSurvey Strategy
A-TITLE Survey Strategy
/scientists/alert-brokersAlert Brokers
https://dp0.lsst.io/External Subdomain Data Preview 0
A-TITLE Data Preview 0
/scientists/users-committeeUsers Committee
A-TITLE Users Committee
/scientists/community-science-...Community Science team
A-TITLE Community Science team
https://rubinobservatory.org/f...External Text duplicate Citizen Science
A-TITLE Citizen Science
/scientists/glossary-acronymsGlossary & Acronyms
A-TITLE Glossary & Acronyms
/scientists/faqFAQ
A-TITLE Scientists FAQ
/scientists/codes-of-conductCodes of Conduct
A-TITLE Code of Conduct
/scientists/wg-board-committeesWorking Groups, Boards, Committees
A-TITLE Working Groups, Boards, Committees
/scientists/international-drh-...International Data Rights Holder List
A-TITLE International Data Rights Holder List
/scientists/in-kind-programIn-Kind Program
A-TITLE In-Kind Program
/scientists/in-kind-program/pr...Programs
A-TITLE in-kind-Programs
/scientists/in-kind-program/re...Resources
A-TITLE In-Kind Resources
/content/data-rightsData Rights
A-TITLE Data Rights
/scientists/in-kind-program/co...CEC
A-TITLE Contribution Evaluation Committee (CEC)
/scientists/in-kind-program/co...Contributed Computing Resources
A-TITLE Contributed Computing Resources
/scientists/in-kind-program/re...Recipients
A-TITLE Recipients
/scientists/in-kind-program/ge...General Pool
/scientists/in-kind-program/re...Resource Needs
A-TITLE Resource Needs
/scientists/in-kind-program/co...Contact
A-TITLE Contact
/scientists/in-kind-program/faqFAQs
A-TITLE In-Kind Program FAQs
/scientists/in-kind-program/So...Software Consultancy
/scientists/citing-lsstCiting Rubin Obs.
A-TITLE Citing LSST
https://rubinobservatory.org/e...External Education
A-TITLE Education
https://rubinobservatory.org/e...External Students
A-TITLE Students
https://rubinobservatory.org/e...External Education FAQs
A-TITLE Education FAQs
https://rubinobservatory.org/e...External Educators
A-TITLE Educators
https://rubinobs.org/education...External Glossary
A-TITLE Glossary
https://rubinobservatory.org/e...External Investigations
A-TITLE Investigations
https://rubinobservatory.org/External Visit Our New Site!
http://www.lsstcorporation.org/External Subdomain LSST Corporation
http://www.aura-astronomy.org/External Subdomain AURA
https://www6.slac.stanford.edu/External Subdomain SLAC
https://www.nsf.gov/External Subdomain NSF
https://www.nsf.gov/od/ogc/leg...External Subdomain Congress
https://www.lsst.org/contactText duplicate Contact
https://rubinobservatory.org/a...External We are Hiring
https://www.lsst.org/userAdmin Login

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.lsst.org/"
HTTP header
(Important)
The HTML page should be transferred using GZip compression.
The web server version is sent within the HTTP header.
The X-powered header is sent within the response header. (unnecessary)
Performance
(Somewhat important)
The page response time is slow (1.33 seconds). The response time should be less than 0.4 seconds. Slow websites are bad for search engine bots and also result in bad user experience.
This page loads 4 CSS files. This may affect the page load time negatively.
This page loads 28 JavaScript files. This may affect the load time negatively.
A Content Delivery Network like Google Hosted Libraries can save bandwidth for the JQuery files.
A Content Delivery Network like Bootstrap CDN can save bandwidth for Bootstrap front-end component library.
The file size of the HTML document is fine (62 kB).

HTTP Response Header

NameValue
dateTue, 28 Jan 2025 05:44:36 GMT
serverApache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips mod_nss/1.0.14 NSS/3.28.4 PHP/7.2.31
x-content-type-optionsnosniff
x-powered-byPHP/7.2.31
x-drupal-cacheHIT
etag"1738039819-0"
content-languageen
x-frame-optionsSAMEORIGIN
permissions-policyinterest-cohort=()
x-generatorDrupal 7 (https://www.drupal.org)
link<https://www.lsst.org/>; rel="canonical",<https://www.lsst.org/>; rel="shortlink"
cache-controlpublic, max-age=0
last-modifiedTue, 28 Jan 2025 04:50:19 GMT
expiresSun, 19 Nov 1978 05:00:00 GMT
varyCookie
transfer-encodingchunked
content-typetext/html; charset=utf-8
statuscode200
http_versionHTTP/1.1

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 2,975 referring domains.
This page has 302,450 backlinks.
This page has backlinks from 1,793 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
Crawl-delay: 10
# CSS, JS, Images
Allow: /misc/*.css$
Allow: /misc/*.css?
Allow: /misc/*.js$
Allow: /misc/*.js?
Allow: /misc/*.gif
Allow: /misc/*.jpg
Allow: /misc/*.jpeg
Allow: /misc/*.png
Allow: /modules/*.css$
Allow: /modules/*.css?
Allow: /modules/*.js$
Allow: /modules/*.js?
Allow: /modules/*.gif
Allow: /modules/*.jpg
Allow: /modules/*.jpeg
Allow: /modules/*.png
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /themes/*.css$
Allow: /themes/*.css?
Allow: /themes/*.js$
Allow: /themes/*.js?
Allow: /themes/*.gif
Allow: /themes/*.jpg
Allow: /themes/*.jpeg
Allow: /themes/*.png
# Directories
Disallow: /includes/
Disallow: /misc/
Disallow: /modules/
Disallow: /profiles/
Disallow: /scripts/
Disallow: /themes/
# Files
Disallow: /CHANGELOG.txt
Disallow: /cron.php
Disallow: /INSTALL.mysql.txt
Disallow: /INSTALL.pgsql.txt
Disallow: /INSTALL.sqlite.txt
Disallow: /install.php
Disallow: /INSTALL.txt
Disallow: /LICENSE.txt
Disallow: /MAINTAINERS.txt
Disallow: /update.php
Disallow: /UPGRADE.txt
Disallow: /xmlrpc.php
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips/
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register/
Disallow: /user/password/
Disallow: /user/login/
Disallow: /user/logout/
# Paths (no clean URLs)
Disallow: /?q=admin/
Disallow: /?q=comment/reply/
Disallow: /?q=filter/tips/
Disallow: /?q=node/add/
Disallow: /?q=search/
Disallow: /?q=user/password/
Disallow: /?q=user/register/
Disallow: /?q=user/login/
Disallow: /?q=user/logout/

Similar sites

Search preview

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
Universe53%Check
Rubin52%Check
Rubin Observatory51%Check
Observatory50%Check
LSST48%Check
org48%Check
DISCOVERY45%Check
support Rubin Observatory45%Check
Site40%Check
SCIENTISTS39%Check
Show more keywords and terms

Test up to 1.000 webpages of lsst.org with our free plan!

Try For Free
No trial. It's just free!

Cookie Policy

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See the following links for more information.

Contact | Privacy

We need these so the site can function properly

So we can better understand how visitors use our website

So we can serve you tailored ads and promotions