Ned.ipac.caltech.edu - SEO Checker

Overview of the SEO Check
Meta information
74% 
Page quality
67% 
Page structure
79% 
Link structure
93% 
Server
22% 
External factors
100% 
SEO Score
Response time
1.02 s
File size
24.00 kB
Words
318
Media files
10
Number of links
64 internal / 9 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Home | NASA/IPAC Extragalactic Database
The length of the page title is perfect. (390 pixels out of 580 max pixel length)
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)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Server location: United States of America
The language is not specified in the HTML markup.
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)
This page is hosted on a subdomain. Use a top level domain for better SEO results.
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.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
GeneratorDrupal 7 (http://drupal.org)
viewportwidth=device-width, initial-scale=1, maximum-scale=1
charsetutf-8

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Page quality

Content
(Critically important)
There are only 318 words on this page. Good pages should have about 800 words of useful content.
25.5% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
6 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 19.57 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
This page loads 5 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1, maximum-scale=1" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 6 tags for this page.
Image SEO
(Somewhat important)
2 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
The HTTPS protocol for secure data transmission is not used.

Page structure

H1 heading
(Critically important)
NASA/IPAC Extragalactic Database
The H1 heading is perfect.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.

Heading structure

Heading levelContent
H1 NASA/IPAC Extragalactic Database
H3 January 2025 Release Highlights
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
There are 9 external links on this page.
LinkAttributesAnchor text
http://ipac.caltech.edu/External Subdomain IMG-ALT IPAC
http://ned.ipac.caltech.edu/Home
A-TITLE One-line Query Entry
http://ned.ipac.caltech.edu/Search Objects
A-TITLE Search for NED Objects by name, near position, etc.
/bynameBy Name
A-TITLE Find Objects by name.
/conesearchNear Name or Position (Cone)
A-TITLE Search objects near a named object, position with radius, or matching IAU name
/inrefcodeIn Refcode
A-TITLE Search for objects in the given reference code
/byparamsBy Parameters
A-TITLE By Parameter search (All-Sky)
http://ned.ipac.caltech.edu/Literature
A-TITLE Find literature by author name, refcode or nomenclature
/refbyauthorReferences by Author Name
A-TITLE Search ADS for references with NED objects by author name
/reflookupReference Lookup
A-TITLE Find literature by Refcode
/srcnomNomenclature
A-TITLE Select entries by acronym or acronym definition
http://ned.ipac.caltech.edu/Services
A-TITLE Classic Home
/gwf/overviewGravitational Wave Followup
A-TITLE Gravitational Wave Followup events
/gwf/overviewOverview
A-TITLE Gravitational Wave Followup overview
/gwf/eventsEvents
A-TITLE Gravitational Wave Followup events
/ticket_monitorTicket Status
A-TITLE Retrieve batch results
/level5/Level5
A-TITLE A knowledgebase for extragalactic astronomy and cosmology
/level5/Knowledge Base
A-TITLE Level 5 Knowledge Base
/level5/Glossary/frames.htmlGlossary
A-TITLE The lexicon and glossary of terms in LEVEL 5
/classic/Classic Home Page
A-TITLE Return to the Classic Home Page for now
http://ned.ipac.caltech.edu/Tools
A-TITLE NED maintained miscellaneous services
/coordinate_calculatorCoordinate Calculator
A-TITLE Coordinate Transform Calculator
/extinction_calculatorExtinction Calculator
A-TITLE Galactic Extinction Calculator
/velocity_calculatorVelocity Calculator
A-TITLE Velocity Correction Calculator
/Documents/OverviewInformation
A-TITLE NED information index
/Documents/OverviewText duplicate Overview
A-TITLE Introduction to NED
/Documents/Overview/ReleaseNews
A-TITLE Release notes and latest information
/Documents/Overview/HistoryArchived Release Notes
/Documents/GuidesUser Guides
A-TITLE Examples and Tutorials
/Documents/Guides/SearchesText duplicate Search Objects
A-TITLE How to search for NED Objects Near a Position, NED or IAU-sytle Named Object
/Documents/Guides/CalculatorsCalculators
/Documents/Guides/InterfaceProgram Interfaces
/Documents/Guides/DatabaseDatabase
/Documents/Guides/TutorialsTutorials
/Documents/Guides/BestPracticesBest Practices
A-TITLE Best Practices For Data Publication
/Documents/Guides/SearchFAQSearch & Retrieval FAQ
A-TITLE How to search and retrieve information
/Documents/Guides/CalculationsScientific Calculations FAQ
/Documents/KnownIssuesKnown Issues
A-TITLE Known Issues
/Documents/Guides/DiscontinuedDiscontinuing Services
/Documents/HoldingsHoldings
A-TITLE Information about NED's contents
/srcnomText duplicate Nomenclature
A-TITLE Select entries by acronym or acronym definition
/CurrentHoldingsCounts
A-TITLE Table of database holdings
/Documents/Holdings/graphicsGraphics
A-TITLE Graphical summaries of holdings
/Documents/Holdings/SetsData Sets
A-TITLE Information about specific data sets
/Documents/ReferencesReferences
A-TITLE References and documents
/Documents/References/NEDpapersArticles about NED
/docs/NEDCurrentBrochure.pdfBrochure (pdf)
A-TITLE NED's current handout
/Documents/References/Cosmolog...Cosmology Calculators
/Documents/References/Extincti...Extinction-Law Calculators
/Documents/References/SitesRelated Sites
/Documents/CommunityCommunity
/Documents/Community/NUCUsers Committee
A-TITLE NED Users Committee
/Documents/Community/AmbassadorAmbassadors
A-TITLE Information about the NED Ambassador program
/Documents/Overview/TeamTeam
/contact/NEDContact Us
A-TITLE Send a message to the NED Team
/help/ui/simplesearch?popup=1Help
A-TITLE Simple Search
/conesearchCone search
https://github.com/Caltech-IPA...External IPAC Firefly
/Documents/Overview/ReleaseInformation » Overview » News
https://science.nasa.gov/open-...External Subdomain Open Science
/uri/ADS::Bibcode/2022ApJS..26...Best Practices for Data Publication in the Astronomical Literature
/Documents/Overview/HistoryIntegration of DESI-EDR increased the objects with redshifts in NED by 1.7M (19%)
/Documents/Overview/ReleaseUpdates to presentation of SEDs and spectral line data.
http://ipac.caltech.edu/External Subdomain Text duplicate IMG-ALT IPAC
http://www.caltech.edu/External Subdomain IMG-ALT Caltech
http://www.nasa.gov/External Subdomain IMG-ALT NASA
/Documents/OverviewAbout NED
/Documents/Overview/Acknowledg...Acknowledging NED
/contact/NEDIMG-ALT EMail
https://www.facebook.com/NASAI...New window External Subdomain IMG-ALT facebook
A-TITLE facebook
https://www.youtube.com/NASAIP...New window External Subdomain IMG-ALT youtube
A-TITLE youtube
http://www.caltech.edu/External Subdomain California Institute of Technology
A-TITLE Caltech
http://ned.ipac.caltech.edu/Anchor back up ↑

Server configuration

HTTP redirects
(Critically important)
The checked page does not redirect to another URL.
HTTP header
(Important)
The HTML page should be transferred using GZip compression.
No X-Powered HTTP header is sent.
Performance
(Somewhat important)
The page response time is slow (1.02 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 5 CSS files. This may affect the page load time negatively.
This page loads 5 JavaScript files. This may affect the load time negatively.
The file size of the HTML document is fine (24 kB).

HTTP Response Header

NameValue
dateSat, 01 Feb 2025 01:47:22 GMT
serverPoseidon
x-content-type-optionsnosniff
content-languageen
x-frame-optionsSAMEORIGIN
cache-controlpublic, max-age=3600
last-modifiedFri, 31 Jan 2025 23:07:26 GMT
expiresSun, 19 Nov 1978 05:00:00 GMT
varyCookie
content-typetext/html; charset=utf-8
transfer-encodingchunked
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 5,700 referring domains.
This page has 456,067 backlinks.
This page has backlinks from 1,405 different ip addresses.

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/
Disallow: /srs/
Disallow: /tap/
Disallow: /ffs/
Disallow: /mrs/
Disallow: /dcs/
Disallow: /cgi-bin/

Search preview

Most important keywords

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

KeywordResultRecheck
IPAC77%Check
NASA65%Check
Database62%Check
Extragalactic62%Check
Extragalactic Database62%Check
NASA/IPAC Extragalactic Database50%Check
Release38%Check
January38%Check
Highlights38%Check
Sites36%Check

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