Cosmos.esa.int - SEO Checker

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Overview of the SEO Check
Meta information
80% 
Page quality
57% 
Page structure
35% 
Link structure
100% 
Server
0% 
External factors
100% 
SEO Score
Response time
0.52 s
File size
214.60 kB
Words
486
Media files
87
Number of links
86 internal / 16 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
COSMOS Cosmos Home - Cosmos
There are word repetitions in the page title.
The length of the page title is perfect. (319 pixels out of 580 max pixel length)
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.cosmos.esa.int/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en-gb
Server location: United States of America
The following language is defined by HTML: en-gb
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
viewportinitial-scale=1.0, width=device-width
langen-gb
og:localeen_GB
og:locale:alternateen_GB
og:site_nameCosmos
og:titleCosmos Home - Cosmos
og:typewebsite
og:urlhttps://www.cosmos.esa.int
content-typetext/html; charset=UTF-8

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Page quality

Content
(Critically important)
There are only 486 words on this page. Good pages should have about 800 words of useful content.
20.6% of the text are stop words.
The page contains a listing, which indicates a good text layout.
3 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 23 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
This page loads 22 JavaScript files. This may affect the load time negatively.
A viewport "initial-scale=1.0, width=device-width" 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 10 tags for this page.
Image SEO
(Somewhat important)
28 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)
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
...mages/cosmos/logos/thumb_athena_logo.pngthumbnail
.../images/cosmos/logos/thumb_lisa_logo.pngthumbnail
...images/cosmos/logos/thumb_ariel_logo.pngthumbnail
...ages/cosmos/logos/thumb_proba-3_logo.pngthumbnail
...images/cosmos/logos/thumb_smile_logo.pngthumbnail
...ages/cosmos/logos/thumb_exomars_logo.pngthumbnail
...ges/cosmos/logos/thumb_envision_logo.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
...images/cosmos/logos/thumb_plato_logo.pngthumbnail
...os/logos/thumb_cometinterceptor_logo.pngthumbnail
...images/cosmos/logos/thumb_juice_logo.pngthumbnail
...cosmos/logos/thumb_mars-express_logo.pngthumbnail
...mages/cosmos/logos/thumb_euclid_logo.pngthumbnail
...ges/cosmos/logos/thumb_integral_logo.pngthumbnail
...mages/cosmos/logos/thumb_cheops_logo.pngthumbnail
.../images/cosmos/logos/thumb_gaia_logo.pngthumbnail
...ages/cosmos/logos/thumb_exomars_logo.pngthumbnail
.../cosmos/logos/thumb_bepicolombo_logo.pngthumbnail
...ages/cosmos/logos/thumb_cluster_logo.pngthumbnail
...s/cosmos/logos/thumb_xmm-newton_logo.pngthumbnail
...cosmos/logos/thumb_solarorbiter_logo.pngthumbnail
.../images/cosmos/logos/thumb_soho_logo.pngthumbnail
.../images/cosmos/logos/thumb_jwst_logo.pngthumbnail
...ages/cosmos/logos/thumb_proba-2_logo.pngthumbnail
...mos/logos/thumb_cassini-huygens_logo.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
.../images/cosmos/logos/thumb_iris_logo.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
...mages/cosmos/logos/thumb_hubble_logo.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
...heme/images/assets/mission_badges_bg.pngthumbnail
...es/cosmos/logos/thumb_hipparcos_logo.pngthumbnail
...mos/logos/thumb_lisa_pathfinder_logo.pngthumbnail
...mages/cosmos/logos/thumb_giotto_logo.pngthumbnail
...ges/cosmos/logos/thumb_herschel_logo.pngthumbnail
...mages/cosmos/logos/thumb_exosat_logo.pngthumbnail
...ages/cosmos/logos/thumb_ulysses_logo.pngthumbnail
...images/cosmos/logos/thumb_cos-b_logo.pngthumbnail
...ages/cosmos/logos/thumb_smart-1_logo.pngthumbnail
...osmos/logos/thumb_venus-express_logo.pngthumbnail
...e/images/cosmos/logos/thumb_iue_logo.pngthumbnail
...ages/cosmos/logos/thumb_rosetta_logo.pngthumbnail
...e/images/cosmos/logos/thumb_iso_logo.pngthumbnail
...mages/cosmos/logos/thumb_planck_logo.pngthumbnail
...-cosmos-theme/images/assets/ESA_Menu.svgESA menu toggle
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...-cosmos-theme/images/assets/ESA_Logo.svgESA logo
...cosmos-theme/images/assets/ESA_Login.svgESA login toggle
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...heme/images/assets/mission_badges_bg.pngthumbnail
...5186c34?t=1734420106695&imageThumbnail=2ESA's fleet
...b84a15b?t=1734420111552&imageThumbnail=2Announcement Image
...8a28c86?t=1734420108321&imageThumbnail=2Artist's Impression of Galaxy
...74eae71?t=1734420109632&imageThumbnail=2Science Faculty Logo
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided
...cosmos-theme/images/assets/ESA_Arrow.svgNo alt attribute provided

Page structure

H1 heading
(Critically important)
Navigation
The H1 heading consists of only one word. There should be more information given.
The H1 heading is too short (10 characters). It should be at least 20 Characters long.
Headings
(Important)
There are 67 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H1 Navigation
H2 Cosmos Home
H2 Cosmos:
H2 The portal for users of ESA's Science Directorate's missions
H3 Athena
H3 LISA
H3 ARIEL
H3 Proba-3
H3 SMILE
H3 ExoMars RFM 2028
H3 EnVision
H3 ACES
H3 Einstein Probe
H3 PLATO
H3 Comet Interceptor
H3 JUICE
H3 Mars Express
H3 Euclid
H3 INTEGRAL
H3 CHEOPS
H3 Gaia
H3 ExoMars 2016
H3 BepiColombo
H3 Cluster
H3 XMM-Newton
H3 Solar Orbiter
H3 SOHO
H3 JWST
H3 Proba-2
H3 Cassini Huygens
H3 Hinode
H3 XRISM
H3 AKARI
H3 Double Star
H3 Suzaku
H3 CoRoT
H3 Microscope
H3 IRIS
H3 Chang'E
H3 Hubble
H3 Chandrayaan-1
H3 Hitomi
H3 Hipparcos
H3 LISA Pathfinder
H3 Giotto
H3 Herschel
H3 EXOSAT
H3 Ulysses
H3 COS-B
H3 SMART-1
H3 Venus Express
H3 IUE
H3 Rosetta
H3 ISO
H3 Planck
H3 cosmos
H3 Latest News
H4 SCI Directorate
H4 Science Resources
H4 Science Faculty
H4 Visiting us
H4 Support
H4 placeholder PeopleEditorPersonalDetails portlet
H5 Information on Supported Missions FOR the scientific and technical communities
H5 Announcements of Opportunities for the Scientific Community
H5 For ESA's Scientific Advisory Structure (SSAC, AWG and SSEWG)
H5 The Science Faculty – for the research activities of our scientists
The number of internal links is ok.
Every linktext is unique.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 16 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://www.cosmos.esa.int/Anchor Skip to Content
/web/athenaAthena 3 future 0
IMG-ALT thumbnail
/web/lisaLISA 2 development 0
IMG-ALT thumbnail
/web/arielARIEL 2 development 0
IMG-ALT thumbnail
/web/proba-3Proba-3 2 development 0
IMG-ALT thumbnail
/web/smile/SMILE 2 development 0
IMG-ALT thumbnail
/web/exomarsExoMars RFM 2028 2 development 0
IMG-ALT thumbnail
/web/envisionEnVision 2 development 0
IMG-ALT thumbnail
http://www.esa.int/Our_Activit...New window External Subdomain ACES 2 development 0
IMG-ALT thumbnail
/web/einstein-probeEinstein Probe 2 development 0
IMG-ALT thumbnail
/web/platoPLATO 2 development 0
IMG-ALT thumbnail
/web/comet-interceptorComet Interceptor 2 development 0
IMG-ALT thumbnail
/web/juiceJUICE 1 (post-) operational 0
IMG-ALT thumbnail
/web/mars-expressMars Express 1 (post-) operational 0
IMG-ALT thumbnail
/web/euclidEuclid 1 (post-) operational 0
IMG-ALT thumbnail
/web/integralINTEGRAL 1 (post-) operational 0
IMG-ALT thumbnail
/web/cheopsCHEOPS 1 (post-) operational 0
IMG-ALT thumbnail
/web/gaiaGaia 1 (post-) operational 0
IMG-ALT thumbnail
/web/exomarsExoMars 2016 1 (post-) operational 0
IMG-ALT thumbnail
/web/bepicolomboBepiColombo 1 (post-) operational 0
IMG-ALT thumbnail
/web/csa/the-missionCluster 1 (post-) operational 0
IMG-ALT thumbnail
/web/xmm-newtonXMM-Newton 1 (post-) operational 0
IMG-ALT thumbnail
/web/solar-orbiterSolar Orbiter 1 (post-) operational 0
IMG-ALT thumbnail
/web/sohoSOHO 1 (post-) operational 0
IMG-ALT thumbnail
/web/jwstJWST 1 (post-) operational 0
IMG-ALT thumbnail
/web/proba-2Proba-2 1 (post-) operational 0
IMG-ALT thumbnail
/web/huygensCassini Huygens 4 collaborative 0
IMG-ALT thumbnail
http://www.esa.int/Our_Activit...New window External Subdomain Hinode 4 collaborative 0
IMG-ALT thumbnail
/web/xrismXRISM 4 collaborative 0
IMG-ALT thumbnail
/web/akariAKARI 4 collaborative 0
IMG-ALT thumbnail
/web/double-starDouble Star 4 collaborative 0
IMG-ALT thumbnail
/web/suzakuSuzaku 4 collaborative 0
IMG-ALT thumbnail
/web/corotCoRoT 4 collaborative 0
IMG-ALT thumbnail
http://sci.esa.int/collaborati...New window External Subdomain Microscope 4 collaborative 0
IMG-ALT thumbnail
http://iris.lmsal.com/index.htmlNew window External Subdomain IRIS 4 collaborative 0
IMG-ALT thumbnail
http://www.esa.int/Our_Activit...New window External Subdomain Chang'E 4 collaborative 0
IMG-ALT thumbnail
/web/hstHubble 4 collaborative 0
IMG-ALT thumbnail
/web/chandrayaan-1Chandrayaan-1 4 collaborative 0
IMG-ALT thumbnail
/web/hitomiHitomi 4 collaborative 0
IMG-ALT thumbnail
/web/hipparcosHipparcos 5 completed 0
IMG-ALT thumbnail
/web/lisa-pathfinderLISA Pathfinder 5 completed 0
IMG-ALT thumbnail
/web/giottoGiotto 5 completed 0
IMG-ALT thumbnail
/web/herschelHerschel 5 completed 0
IMG-ALT thumbnail
/web/exosatEXOSAT 5 completed 0
IMG-ALT thumbnail
/web/ulyssesUlysses 5 completed 0
IMG-ALT thumbnail
/web/cos-bCOS-B 5 completed 0
IMG-ALT thumbnail
/web/smart-1SMART-1 5 completed 0
IMG-ALT thumbnail
/web/venus-expressVenus Express 5 completed 0
IMG-ALT thumbnail
http://sci.esa.int/iue/New window External Subdomain IUE 5 completed 0
IMG-ALT thumbnail
/web/rosettaRosetta 5 completed 0
IMG-ALT thumbnail
/web/isoISO 5 completed 0
IMG-ALT thumbnail
/web/planckPlanck 5 completed 0
IMG-ALT thumbnail
https://www.cosmos.esa.int/Subdomain No Text
https://www.cosmos.esa.int/Anchor IMG-ALT ESA menu toggle
/c/portal/loginNofollow Sign in
https://www.esa.int/New window External Subdomain The European Space Agency
https://sci.esa.int/New window External Subdomain Science & Technology
https://www.cosmos.esa.int/Subdomain IMG-ALT ESA logo
/my-accountMy Account
/c/portal/logoutSign out
https://www.cosmos.esa.int/Subdomain COSMOS Portal
/c/portal/loginNofollow Text duplicate Sign in
IMG-ALT ESA login toggle
https://sci.esa.int/New window External Subdomain Text duplicate Science & Technology
https://www.esa.int/New window External Subdomain European Space Agency
https://www.cosmos.esa.int/Subdomain IMG-ALT thumbnail
A-TITLE Go to Cosmos
/our-missionsInformation on Supported Missions FOR the scientific and technical communities
/web/science-announcement-of-o...Announcements of Opportunities for the Scientific Community
/science-advisory-structureFor ESA's Scientific Advisory Structure (SSAC, AWG and SSEWG)
/web/space-science-facultyThe Science Faculty – for the research activities of our scientists
/web/space-science-faculty/opp...New window Subdomain ESA SCI Research Fellowships open for submissions
https://www.esa.int/Science_Ex...New window External Subdomain Cluster mission set to end with reentry over South Pacific
/web/xmm-newton/ao24New window Subdomain 24th XMM-Newton Announcement of Opportunity
https://www.esa.int/Science_Ex...New window External Subdomain Juice rerouted to Venus in world’s first lunar-Earth flyby
https://www.esa.int/Science_Ex...New window External Subdomain Gaia spots possible moons around hundreds of asteroids
/news-archiveNews Archive
http://www.esa.int/New window External Subdomain ESA home page
http://sci.esa.int/New window External Subdomain ESA Science and Technology website
/web/scinews/newslettersNew window Subdomain ESA Science Newsletter homepage
/science-advisory-structureScience Advisory Structure
/web/science-announcement-of-o...Announcements and Calls
http://www.esa.int/About_Us/Ca...New window External Subdomain Job Vacancies
/web/guest/contact-detailsContact our Directorate
/web/guest/about-sciAbout SCI
/web/esdcScience Archives
/web/guest/document-portalDocument Portal
/web/guest/mission-publicationsMission Publications
/conferencesConferences & Workshops
/web/sci-s/tech-talksTech-Talks
/web/guest/mailing-lists-overviewMailing Lists
/web/space-science-facultySpace Science Faculty
/web/space-science-faculty/opp...Research Fellowships
/web/space-science-faculty/eve...Science Seminars
/web/eduroamEDUROAM
/web/guest/visit-estecESTEC
/web/guest/visit-esacESAC
/web/situSciOps IT Services (SITU)
/web/situ/supportSITU Service Desk
/web/cosmos-helpCosmos Portal Help & FAQ
/web/esac-csaCross Mission Activities
/web/esac-pa-qaSciOps Product Assurance
/web/cosmos-help/privacy-policyPrivacy Policy
/cookie-policyFind out more about our cookie policy.
A-TITLE Our cookie policy

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.cosmos.esa.int/"
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 of 0.52 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
This page loads 9 CSS files. This may affect the page load time negatively.
This page loads 22 JavaScript files. This may affect the load time negatively.
The file size of the HTML document is fine (215 kB).

HTTP Response Header

NameValue
dateThu, 03 Apr 2025 07:15:50 GMT
serverApache
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN, SAMEORIGIN
x-xss-protection1
expiresThu, 01 Jan 1970 00:00:00 GMT
cache-controlprivate, no-cache, no-store, must-revalidate
pragmano-cache
etag"9aa4b067"
content-typetext/html;charset=UTF-8
content-length219821
set-cookie69 Characters
x-forwarded-protohttps
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 6,896 referring domains.
This page has 186,698 backlinks.
This page has backlinks from 2,596 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

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Search preview

            www.cosmos.esa.int
COSMOS Cosmos Home - Cosmos


Most important keywords

            
Following keywords were found. You can check the keyword optimization of this page for each keyword.
KeywordResultRecheck
COSMOS68%Check
COSMOS Portal54%Check
Navigation50%Check
mission49%Check
Missions47%Check
Science46%Check
Faculty46%Check
Science Faculty46%Check
JUICE45%Check
Gaia45%Check
  
      Show more keywords and terms  
            

                

                    
                    

                        
                    

                    

                        
                    

                

            

            
                    

                

            


                    

            

                

                    

                    

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