Cesar.esa.int - SEO Checker

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Overview of the SEO Check
Meta information
70% 
Page quality
26% 
Page structure
79% 
Link structure
25% 
Server
19% 
External factors
100% 
SEO Score
Response time
0.77 s
File size
49.20 kB
Words
792
Media files
48
Number of links
54 internal / 5 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
CESAR / ESA - Educational Initiative CESAR / ESA - Educational Initiative
The page title should be shorter than 580 pixels. It is 666 pixels long. Optimize title
There are word repetitions in the page title.
Meta description
(Critically important)
Cooperation through Education in Science and Astronomy Research
The length of the meta description is perfect. (420 pixels out of 1000 max pixel length)
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: es
Language defined in HTML: en
Server location: United States of America
The given language en does not conform with the detected language es.
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
descriptionCooperation through Education in Science and Astronomy Research
langen
og:titleCESAR / ESA - Educational Initiative
og:descriptionCooperation through Education in Science and Astronomy Research
og:imagehttps://cesar.esa.int/images/Logo_CESAR_Transparente.png
og:typearticle
og:localeen_US
og:locale:alternatees_ES
content-typetext/html; charset=UTF-8

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Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
The average number of words per sentence of 56.13 words is high.
This page contains 792 words. That's ok.
21.5% of the text are stop words.
The page contains a listing, which indicates a good text layout.
11 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No viewpoint tag is provided.
No Apple touch icon is specified.
This page loads 5 JavaScript files. This may affect the load time negatively.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 16 tags for this page.
Image SEO
(Somewhat important)
47 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
/images/es-big-flag.pngNo alt attribute provided
/images/en-big-flag.pngNo alt attribute provided
/images/Logo_CESAR_Transparente.pngNo alt attribute provided
/images/icon-excursions-bus-tour.pngNo alt attribute provided
/upload/202302/education.pngNo alt attribute provided
/images/home_online_science.pngNo alt attribute provided
/images/home_teachers_class.pngNo alt attribute provided
https://cesar.esa.int/images/icon_sun.pngNo alt attribute provided
/upload/201709/circle-1300241_960_720.pngNo alt attribute provided
/upload/202407/image_(19).jpgNo alt attribute provided
/upload/202407/image_(3).jpgNo alt attribute provided
/upload/202407/curso_profesores.jpgNo alt attribute provided
/upload/202407/elescorial.jpegNo alt attribute provided
/upload/multimedia/201605/VideoJavier.jpgNo alt attribute provided
/upload/multimedia/202308/Gustavo.pngNo alt attribute provided
...media/202307/CESAR_anuncio_640x360_2.pngNo alt attribute provided
/upload/multimedia/202306/exoplanet.pngNo alt attribute provided
...d/multimedia/202212/IntroDerecho-160.jpgNo alt attribute provided
...w_Observatory_Helios_Night_CESAR-160.jpgNo alt attribute provided
/upload/multimedia/202010/DSC00005-160.jpgNo alt attribute provided
...media/202009/NightobsControlRoom-160.jpgNo alt attribute provided
...1/Helios_Sun_2017_poster_visible-160.jpgNo alt attribute provided
...01/Helios_Sun_2017_poster_halpha-160.jpgNo alt attribute provided
.../multimedia/201706/Sun_CESO_prot-160.jpgNo alt attribute provided
...201702/Auroras_sobre_Kiruna_Pic1-160.jpgNo alt attribute provided
/images/Telescopio_Rotacion_180p.gifNo alt attribute provided
/images/offline_webcam.pngNo alt attribute provided
/sun_monitor/webcams/Cebreros_inside.jpgNo alt attribute provided
/images/offline_webcam.pngNo alt attribute provided
/sun_monitor/webcams/Cebreros_outside.jpgNo alt attribute provided
/images/Antena_Rotacion_180p.gifNo alt attribute provided
/images/offline_webcam.pngNo alt attribute provided
/sun_monitor/webcams/Vil1_backup.jpgNo alt attribute provided
/images/Telescopio_Solar_180p.gifNo alt attribute provided
/images/offline_webcam.pngNo alt attribute provided
/sun_monitor/webcams/Helios_inside.jpgNo alt attribute provided
/images/offline_webcam.pngNo alt attribute provided
/sun_monitor/webcams/Helios_outside.jpgNo alt attribute provided
https://cesar.esa.int/images/Lx200_180p.gifNo alt attribute provided
/images/offline_webcam.pngNo alt attribute provided
/upload/webcams/robledo_int.jpgNo alt attribute provided
/images/offline_webcam.pngNo alt attribute provided
/upload/webcams/robledo_ext.jpgNo alt attribute provided
/images/home_cubesat.pngNo alt attribute provided
/images/offline_webcam.pngNo alt attribute provided
/images/webcam_control_center.jpgNo alt attribute provided
/images/logos_cesar.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 Cebreros Optical Telescope
H2 Vil1 Radio Antenna
H2 Solar Observatory
H2 Robledo Optical Telescope
H2 Control Room - CubeSats
H3 ¿Qué es CESAR?
H3 Ciencia educativa con CESAR
H3 Noticias
H3 Calendario
H3 Vídeos
H3 Imágenes
H3 Infraestructura
H4 Actividades para colegios Experiencias mentorizadas por expertos en espacio
H4 Visitas para Universidades Tour por ESAC
H4 Casos científicos interactivos Haz ciencia desde tu colegio
H4 Curso de profesores Formación en ciencias del espacio
H4 El Sol en directo Sigue la retransmisión semanal del Sol
H4 Colabora con nosotros Desarrolla contenido con nosotros
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.
12 links don't have an anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
There are 5 external links on this page.

Found links on this page

LinkAttributesAnchor text
/index.php?ChangeLang=esNo Text
/index.php?ChangeLang=enNo Text
https://cesar.esa.int/index.phpNo Text
/index.php?Section=NewsNoticias
/index.php?Section=LecturesExperiencias
/index.php?Section=TeachersPara Educadores
/index.php?Section=EventsEventos
/index.php?Section=ObservatoriesObservatorios
/index.php?Section=MultimediaMultimedia
/index.php?Section=ContactContactar
/index.php?Section=Teachersla sección para profesores
/index.php?Section=SSENo Text
/index.php?Section=Educational...No Text
/index.php?Section=Interactive...No Text
/index.php?Section=Teacher_Tra...No Text
/index.php?Section=Live_SunNo Text
/index.php?Section=Join_usNo Text
/index.php?Section=News&Id=324Diversidad y Ciencia: niños y niñas saharauis exploran el Cosmos en ESAC
/index.php?Section=News&Id=322Año estelar: más de 5,000 estudiantes han realizado SSEs este último curso
/index.php?Section=News&Id=323Cierre del Ciclo Formativo CESAR & Co 2023-2024: Hacia una Educación Científica Inclusiva y Diversa
/index.php?Section=News&Id=325Visita de los estudiantes universitarios del Curso de Verano San Lorenzo de El Escoria
/index.php?Section=NewsVer todas las noticias
/index.php?Section=Multimedia&...Presentation by Javier Ventura - ESA/ESAC/CESAR (English)
/index.php?Section=Multimedia&...No Text
/index.php?Section=Multimedia&...The Story of James Webb (part 1)
/index.php?Section=Multimedia&...No Text
/index.php?Section=Multimedia&...CESAR te lleva a explorar el espacio
/index.php?Section=Multimedia&...No Text
/index.php?Section=Multimedia&...Hack an Exoplanet with ESA Education | Live Event
/index.php?Section=VideosVer todos los vídeos
/index.php?Section=Multimedia&...Introducción al derecho espacial 2022
/index.php?Section=Multimedia&...Nieve en los observatorios
/index.php?Section=Multimedia&...Observatorios ópticos nocturnos en ESAC
/index.php?Section=Multimedia&...Sala de control del observatorio nocturno
/index.php?Section=Multimedia&...The Sun in 2017 (visible channel)
/index.php?Section=Multimedia&...The Sun in 2017 (H-alpha channel)
/index.php?Section=Multimedia&...El Sol está activo! Protuberancia en el Sol
/index.php?Section=Multimedia&...Auroras en Kiruna
/index.php?Section=Observatori...Subdomain CEOT
/index.php?Section=Observatori...Subdomain VIL1
https://www.google.com/maps/@4...New window External Subdomain map
/index.php?Section=Observatori...Subdomain HELIOS
http://www.esa.int/About_Us/ESACNew window External Subdomain European Space Astronomy Centre - ESAC
https://www.google.com/maps/@4...New window External Subdomain Text duplicate map
/index.php?Section=Observatori...Subdomain CERT
/index.php?Section=NewsText duplicate Noticias
/index.php?Section=LecturesText duplicate Experiencias
/index.php?Section=ObservatoriesText duplicate Observatorios
/index.php?Section=TeachersText duplicate Para Educadores
/index.php?Section=MultimediaText duplicate Multimedia
/index.php?Section=Interactive...Casos Científicos
/index.php?Section=Space_Scien...Space Science Experience
/index.php?Section=Educational...Excursiones Educativas
/index.php?Section=Talk_with_a...Habla con un astrónomo
/index.php?Section=Our_TeamQuienes somos
/index.php?Section=ContactContacta con nosotros
/index.php?Section=SubscriptionSubscríbete
https://twitter.com/esa_cesar_esExternal Síguenos en Twitter
http://www.esa.int/Services/Te...External Subdomain Terminos de uso | Política de privacidad | Aviso legal

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://cesar.esa.int/"
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 of 0.77 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 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 (49 kB).

HTTP Response Header

NameValue
dateTue, 20 Aug 2024 02:14:19 GMT
serverApache/2.4.37 (Red Hat Enterprise Linux)
x-powered-byPHP/7.4.33
set-cookie70 Characters
connectionclose
content-typetext/html; charset=UTF-8
statuscode200
http_versionHTTP/1.1

External factors

Blacklists
(Nice to have)
This website is not classified "for adult only".
This website has excellent links from other websites.
This page has backlinks from 310 referring domains.
This page has 873 backlinks.
This page has backlinks from 226 different ip addresses.
Facebook popularity
(Somewhat important)
The page has 0 shares and comments on Facebook.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

No valid Robots.txt file was found.

Similar sites

Search preview

cesar.esa.int
CESAR / ESA - Educational Initiative CESAR / ESA - Educational Init...
Cooperation through Education in Science and Astronomy Research

Most important keywords

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

KeywordResultRecheck
CESAR68%Check
Education59%Check
CESAR Co 2023-202455%Check
equipo CESAR52%Check
Ciclo Formativo CESAR Co51%Check
Science48%Check
en ESAC47%Check
Sol en directo47%Check
Astronomy46%Check
Cooperation46%Check
Show more keywords and terms

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