Astro4edu.org - SEO Checker

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Overview of the SEO Check
Meta information
80% 
Page quality
88% 
Page structure
79% 
Link structure
78% 
Server
45% 
External factors
100% 
SEO Score
Response time
0.15 s
File size
30.60 kB
Words
696
Media files
17
Number of links
83 internal / 15 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
IAU Office of Astronomy for Education
The length of the page title is perfect. (338 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
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
viewportwidth=device-width, initial-scale=1
msapplication-TileColor#ffffff
msapplication-TileImage/static/assets/images/favicons/ms-icon-144x144.png
theme-color#ffffff
descriptionThe IAU Office of Astronomy for Education is the IAU's office focussed on primary and secondary education.
langen
twitter:cardsummary_large_image
twitter:site@astro4edu
og:titleIAU Office of Astronomy for Education
og:descriptionThe IAU Office of Astronomy for Education is the IAU's office focussed on primary and secondary education.
og:imagehttp://astro4edu.org/static/assets/images/default_teaser.png
og:image:secure_urlhttps://astro4edu.org/static/assets/images/default_teaser.png
og:image:altThe logo of the IAU Office of Astronomy for Education infront of an image of the plane of the Milky Way
og:localeen
X-UA-CompatibleIE=edge
charsetutf-8

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Page quality

Content
(Critically important)
The average number of words per sentence of 28.64 words is high.
This page contains 696 words. That's ok.
30.7% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
The page contains a listing, which indicates a good text layout.
14 paragraphs were found on this page.
The text content is perfect.
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)
A viewport "width=device-width, initial-scale=1" 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 14 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
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
/static/assets/images/OAE.pngIAU OAE text logo
/static/assets/images/oae_more.pngIAU Office of Astronomy for Education logo
/static/assets/images/oae_more.pngIAU Office of Astronomy for Education logo
/static/assets/images/OAE_icon_1.pngProfessionalize astronomy education icon
/static/assets/images/OAE_icon_2.pngresources icon
/static/assets/images/OAE_icon_3.pngPromote astronomy icon
/static/assets/images/OAE_icon_4.pngOAE Networking icon
/static/assets/images/OAE_icon_5.pngSpread the news icon
...easers/OAE_logo_NAEC_Romania_teaser4.jpgDefault news image
...2025_picture2_news_thumbnail_APRuuHY.jpgIndo-French Exchange and Astronomy Training Thumbnail
...ngMingantu_v2_news_thumbnail_eOEEFu2.pngNational Astronomy Teacher Training in Inner Mongolian Grasslands Thumbnail
...es/sponsors/logo_haus_der_astronomie.svgLogo Haus der Astronomie
/static/assets/images/sponsors/IAU_logo.svgLogo IAU | International Astronomical Union
/static/assets/images/sponsors/logo-kts.svgLogo KTS | Klaus Tschira Foundation
...ts/images/sponsors/carlzeissstiftung.svgLogo Carl Zeiss Stiftung
...images/sponsors/shaw-prize_logo-grey.svgLogo Shaw Prize
...ice_of_astronomy_for_education_white.pngIAU OAE logo

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 OAE Objectives
H2 Latest OAE News
H2 Teacher training event in Romania
H2 Indo-French Exchange and Astronomy Training
H2 National Astronomy Teacher Training in Inner Mongolian Grasslands
H3 About Us
H3 Centers and Nodes
H3 Improve your teaching
H3 NAEC teams
H3 Resources
H3 OAE Mailing List
H3 Professionalize astronomy education
H3 Provide access to good resources
H3 Promote astronomy in curricula
H3 OAE Networking
H3 Spread the news
H3 Collaborate with us
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 15 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://astro4edu.org/IMG-ALT IAU OAE text logo
A-TITLE OAE home page
https://astro4edu.org/Home
https://astro4edu.org/resourcesResources
/resources/search/Search Educational Resources
/resources/category/Browse Educational Resources by Topic
/resources/images/Browse Images
https://astroedu.iau.org/External Subdomain AstroEdu - Classroom Activities
https://astro4edu.org/bigideasBig Ideas - Astronomy Literacy
/resources/glossary/search/Glossary
/oae-reviews/OAE Reviews
https://astro4edu.org/worldwide/Astronomy Education Worldwide
/select-external-resources/Select External Resources
https://astro4edu.org/eventsEvents
https://astro4edu.org/shaw-iau/Shaw-IAU Workshops
https://astro4edu.org/GA2024IAU GA 2024
https://astro4edu.org/news/News
/connect-with-usConnect with us
https://astro4edu.org/collaborateCollaboration Opportunities
/naec-network/National Astronomy Education Coordinators
/mailing-listOAE Mailing List
/social-mediaOAE on Social Media
https://astro4edu.org/contactContact Us
https://astro4edu.org/about-usAbout us
/mission-objectivesMission & Objectives
https://astro4edu.org/locations/OAE Centers and Nodes
/naec-network/Text duplicate National Astronomy Education Coordinators
/steering-committeeSteering Committee
https://astro4edu.org/documentsImportant OAE Documents
https://www.facebook.com/astro...External Subdomain A-TITLE Follow the IAU OAE on Facebook
https://bsky.app/profile/astro...External A-TITLE Follow the IAU OAE on Bluesky
https://www.youtube.com/channe...External Subdomain A-TITLE Follow the IAU OAE on Youtube
https://astro4edu.org/about-usFind out more
https://astro4edu.org/locations/network of locations at partner institutions
/oae-reviews/Text duplicate OAE Reviews
/naec-network/National Astronomy Education Coordinators (NAECs)
/naec-network/DE/including the NAEC team for Germany
https://astro4edu.org/resourcesresources
/mailing-listsubscribe to our mailing list
https://astro4edu.org/ttpgrants for teacher training programs
/oae-reviews/Text duplicate OAE Reviews
https://astro4edu.org/shaw-iau/Shaw-IAU workshops on astronomy for education
/resources/search/search our resources
/resources/category/browse resources by category
/resources/images/image gallery
/resources/glossary/search/multilingual glossary
https://astro4edu.org/worldwide/our survey
/naec-network/Text duplicate National Astronomy Education Coordinators (NAECs)
/naec-network/DE/NAEC team for Germany
/mailing-list/OAE mailing list
/social-mediasocial media
https://astro4edu.org/contactGet in contact
/news/Q862op/IMG-ALT Default news image
A-TITLE link to Teacher training event in Romania
/news/Q862op/Teacher training event in Romania
/news/Q862op/» MORE
/news/yI827XY/IMG-ALT Indo-French Exchange and Astronomy Training Thumbnail
A-TITLE link to Indo-French Exchange and Astronomy Training
/news/yI827XY/Indo-French Exchange and Astronomy Training
/news/yI827XY/Text duplicate » MORE
/news/pq769I0/IMG-ALT National Astronomy Teacher Training in Inner Mongolian Grasslands Thumbnail
A-TITLE link to National Astronomy Teacher Training in Inner Mongolian Grasslands
/news/pq769I0/National Astronomy Teacher Training in Inner Mongolian Grasslands
/news/pq769I0/Text duplicate » MORE
https://www.haus-der-astronomi...New window External Subdomain IMG-ALT Logo Haus der Astronomie
A-TITLE Haus der Astronomie
https://www.iau.org/New window External Subdomain IMG-ALT Logo IAU | International Astronomical Union
A-TITLE IAU | International Astronomical Union
https://www.klaus-tschira-stif...New window External Subdomain IMG-ALT Logo KTS | Klaus Tschira Foundation
A-TITLE KTS | Klaus Tschira Foundation
https://www.carl-zeiss-stiftun...New window External Subdomain IMG-ALT Logo Carl Zeiss Stiftung
A-TITLE Carl Zeiss Stiftung
https://www.shawprize.org/New window External Subdomain IMG-ALT Logo Shaw Prize
A-TITLE The Shaw Prize Foundation
https://astro4edu.org/IMG-ALT IAU OAE logo
A-TITLE OAE home page
https://astro4edu.org/resourcesText duplicate Resources
/resources/search/Text duplicate Search Educational Resources
/resources/category/Text duplicate Browse Educational Resources by Topic
/resources/images/Text duplicate Browse Images
https://astroedu.iau.org/External Subdomain Text duplicate AstroEdu - Classroom Activities
https://astro4edu.org/bigideasText duplicate Big Ideas - Astronomy Literacy
/resources/glossary/search/Text duplicate Glossary
/oae-reviews/Text duplicate OAE Reviews
https://astro4edu.org/worldwide/Text duplicate Astronomy Education Worldwide
/select-external-resources/Text duplicate Select External Resources
https://astro4edu.org/eventsText duplicate Events
https://astro4edu.org/shaw-iau/Text duplicate Shaw-IAU Workshops
https://www.iau.org/news/annou...External Subdomain IAU Code of Conduct
/connect-with-usText duplicate Connect with us
https://astro4edu.org/collaborateText duplicate Collaboration Opportunities
/mailing-listText duplicate OAE Mailing List
/social-mediaText duplicate OAE on Social Media
https://astro4edu.org/contactContact
https://astro4edu.org/about-usAbout The OAE
/mission-objectivesText duplicate Mission & Objectives
https://astro4edu.org/locations/Text duplicate OAE Centers and Nodes
/naec-network/Text duplicate National Astronomy Education Coordinators
/steering-committeeText duplicate Steering Committee
https://astro4edu.org/documentsText duplicate Important OAE Documents
https://markup.themewagon.com/...External Subdomain Titan
https://www.facebook.com/astro...External Subdomain Text duplicate A-TITLE Follow the IAU OAE on Facebook
https://bsky.app/profile/astro...External Text duplicate A-TITLE Follow the IAU OAE on Bluesky
https://www.youtube.com/channe...External Subdomain Text duplicate A-TITLE Follow the IAU OAE on Youtube
https://astro4edu.org/contactText duplicate Contact
/privacy-policyPrivacy Policy
https://astro4edu.org/imprintImprint
https://astro4edu.org/Anchor A-TITLE scroll to top of page

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://astro4edu.org/"
HTTP header
(Important)
The HTML page should be transferred using GZip compression.
The web server version is sent within the HTTP header.
No X-Powered HTTP header is sent.
Performance
(Somewhat important)
The page response time is excellent with 0.15 seconds.
The file size of the HTML document is fine (31 kB).

HTTP Response Header

NameValue
servernginx/1.20.1
dateTue, 13 Jan 2026 20:09:45 GMT
content-typetext/html; charset=utf-8
content-length31306
varyAccept-Language, Cookie
content-languageen
x-frame-optionsDENY
x-content-type-optionsnosniff
referrer-policysame-origin
cross-origin-opener-policysame-origin
strict-transport-securitymax-age=63072000; includeSubdomains
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 65 referring domains.
This page has 4,592 backlinks.
This page has backlinks from 58 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

# All robots allowed
User-agent: *
Disallow:

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Most important keywords

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

KeywordResultRecheck
Astronomy63%Check
Astronomy Education62%Check
Education58%Check
National Astronomy Education57%Check
National Astronomy55%Check
Office54%Check
IAU54%Check
IAU Office54%Check
OAE51%Check
training51%Check
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