Zah.uni-heidelberg.de - SEO Checker

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Overview of the SEO Check
Meta information
59% 
Page quality
61% 
Page structure
45% 
Link structure
60% 
Server
10% 
External factors
82% 
SEO Score
Response time
1.05 s
File size
35.60 kB
Words
515
Media files
19
Number of links
49 internal / 20 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Welcome to the Centre for Astronomy of Heidelberg University: Zentrum für Astronomie
The title contains the word Welcome to! More content should be covered in the title.
The page title should be shorter than 580 pixels. It is 779 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)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en-us
Server location: United States of America
The following language is defined by HTML: en-us
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.
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
generatorTYPO3 CMS
viewportwidth=device-width, initial-scale=1
robotsindex,follow
apple-mobile-web-app-capableno
langen-us
og:titleWelcome to the Centre for Astronomy of Heidelberg University
og:site_nameZentrum für Astronomie
x-ua-compatibleIE=edge
charsetutf-8

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Page quality

Content
(Critically important)
Words from the H1 heading are not used in the page content.
This page contains 515 words. That's ok.
20.6% 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.
10 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 12.33 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 8 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1" is provided.
Bold and strong tags
(Somewhat important)
Some tags are too long. With 84 characters this one is longer than 70 characters:
"the origin of interstellar dust: from local supernovae to the high-redshift universe"
Image SEO
(Somewhat important)
16 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
.../Public/Images/schriftzug_mit_siegel.gifRuprecht-Karls-Universität Heidelberg
...ge/Resources/Public/Images/text_logo.pngZentrum Astronomie
...cessed_/3/6/csm_Gaia_logo_64e7fcc9d0.pngNo alt attribute provided
...essed_/4/4/csm_STRUCTURES_6ec4e6f2d6.pngNo alt attribute provided
...ssed_/5/c/csm_gavologos-2_932c32a792.pngNo alt attribute provided
...cessed_/c/c/csm_RAVE_logo_79781d9374.jpgNo alt attribute provided
...ocessed_/a/c/csm_LBT_Logo_e96a346b90.jpgNo alt attribute provided
...processed_/f/b/csm_Ecogal_836f76d237.jpgNo alt attribute provided
.../_processed_/a/8/csm_LSST_f601fe59df.pngNo alt attribute provided
..._processed_/2/6/csm_ZAH_X_df8468cd5d.jpgNo alt attribute provided
...ssed_/0/7/csm_ZAH_Youtube_7d8546d9c9.pngNo alt attribute provided
...processed_/a/2/csm_BH3_en_64696227cf.jpgNo alt attribute provided
...0/5/csm_Patzer_Award_2024_bbb1783233.jpgNo alt attribute provided
...b/a/csm_Wylezalek_small_2_8b1cea72b2.pngNo alt attribute provided
...ssed_/4/8/csm_Klare_Small_26d85aaf5e.jpgNo alt attribute provided
...0/2/csm_Wambsganss_small2_21bb88482a.jpgNo alt attribute provided
..._/0/8/csm_Wylezalek_small_9f59a0d1ee.pngNo alt attribute provided
..._/2/6/csm_Wambsganss_2jpg_97354e8060.jpgNo alt attribute provided
...age/Resources/Public/Images/icon_top.gifzum Seitenanfang/up

Page structure

H1 heading
(Critically important)
Welcome to the Centre for Astronomy of Heidelberg University
The H1 heading contains the words Welcome to! Use important keywords instead.
Headings
(Important)
The structure of headings is missing one or more levels. Do not skip heading levels.
Some headings do not have any content.

Heading structure

Heading levelContent
H1 Welcome to the Centre for Astronomy of Heidelberg University
H2 Empty heading
H4 Gaia Quick Links
H4 GAIA based publications
H4 Patzer Award for Brooke Polak (ITA) and Jose Eduardo Mendez-Delgado (ARI)
H4 Hengstberger Award for Dr. Dominika Wylezalek
H4 The Landessternwarte mourns the loss of Dr. Gerhard Klare
H4 Joachim Wambsganss is new director of ZAH
H4 Dominika Wylezalek admitted to the Young Academy
H4 2024 Copernicus Award for Joachim Wambsganss
H4 More news and research 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.
2 links don't have an anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
There are 20 external links on this page.

Found links on this page

LinkAttributesAnchor text
/welcomeAnchor Navigation
/welcomeAnchor Content
https://www.uni-heidelberg.de/External Subdomain IMG-ALT Ruprecht-Karls-Universität Heidelberg
https://zah.uni-heidelberg.de/IMG-ALT Zentrum Astronomie
/welcomeWelcome
/standard-titelAbout ZAH
/institutesInstitutes
/research-groupsResearch Groups
/research-collaborationsResearch Collaborations
/studying-astronomyStudying Astronomy
/talks-seminars-eventsEvents, Seminars, Talks
/hjacHeidelberg Joint Astronomical Colloquium (HJAC)
/publicationsPublications
/gliese-fellowship-programmGliese Fellowship Programm
/outreach-media-contactOutreach & Media Contact
/service/personnelPersonnel
/astronomy-physics-in-heidelbergAstronomy & Physics in Heidelberg
/zah-internal-pagesZAH Internal Pages
/gaiaSubdomain No Text
/gaiaSubdomain Gaia Quick Links
/gaiaNew window Subdomain Gaia @ARI
https://www.cosmos.esa.int/web...New window External Subdomain Gaia @ESA
https://www.cosmos.esa.int/web...New window External Subdomain Gaia DR3
/gaia/outreach/gaiaskyNew window Subdomain Gaia Sky
https://ui.adsabs.harvard.edu/...New window External Subdomain ADS
https://www.structures.uni-hei...External Subdomain No Text
http://www.g-vo.org/External Subdomain No Text
https://www.rave-survey.org/External Subdomain No Text
https://www.lsw.uni-heidelberg...External Subdomain No Text
http://www.ecogal.eu/External Subdomain No Text
https://lsstdiscoveryalliance....External No Text
https://twitter.com/zah_hdExternal No Text
https://www.youtube.com/user/A...External Subdomain No Text
/service/contactContact
/service/searchSearch
/service/personnelText duplicate Personnel
/de/willkommenDeutsch
/welcomeZentrum für Astronomie
/news/detail/extraordinary-bla...Subdomain No Text
/news/detail/patzer-award-for-...A-TITLE Patzer Award for Brooke Polak (ITA) and Jose Eduardo Mendez-Delgado (ARI)
/news/detail/patzer-award-for-...Text duplicate Patzer Award for Brooke Polak (ITA) and Jose Eduardo Mendez-Delgado (ARI)
A-TITLE Patzer Award for Brooke Polak (ITA) and Jose Eduardo Mendez-Delgado (ARI)
/news/detail/hengstberger-awar...A-TITLE Hengstberger Award for Dr. Dominika Wylezalek
/news/detail/hengstberger-awar...Text duplicate Hengstberger Award for Dr. Dominika Wylezalek
A-TITLE Hengstberger Award for Dr. Dominika Wylezalek
/news/detail/the-landessternwa...A-TITLE The Landessternwarte mourns the loss of Dr. Gerhard Klare
/news/detail/the-landessternwa...Text duplicate The Landessternwarte mourns the loss of Dr. Gerhard Klare
A-TITLE The Landessternwarte mourns the loss of Dr. Gerhard Klare
/news/detail/joachim-wambsgans...A-TITLE Joachim Wambsganss is new director of ZAH
/news/detail/joachim-wambsgans...Text duplicate Joachim Wambsganss is new director of ZAH
A-TITLE Joachim Wambsganss is new director of ZAH
/news/detail/dominika-wylezale...A-TITLE Dominika Wylezalek admitted to the Young Academy
/news/detail/dominika-wylezale...Text duplicate Dominika Wylezalek admitted to the Young Academy
A-TITLE Dominika Wylezalek admitted to the Young Academy
https://www.uni-heidelberg.de/...New window External Subdomain A-TITLE 2024 Copernicus Award for Joachim Wambsganss
https://www.uni-heidelberg.de/...New window External Subdomain Text duplicate 2024 Copernicus Award for Joachim Wambsganss
A-TITLE 2024 Copernicus Award for Joachim Wambsganss
/newsMore news and research highlights ►►►►
/welcomeAnchor IMG-ALT zum Seitenanfang/up
https://heico.uni-heidelberg.d...New window External Subdomain Anchor Winter Term 24/25
/typo3/index.php?route=/record...New window Subdomain HePhySTO – HEidelberg PHYsics Seminar Talks Organizer
A-TITLE Bearbeiten
/talks-seminars-events/details...Heidelberg Joint Astronomical Colloquium
/talks-seminars-events/details...ARI Institute Colloquium
/talks-seminars-events/details...Text duplicate Heidelberg Joint Astronomical Colloquium
/talks-seminars-eventsmore colloquia ...
A-TITLE Opens internal link in current window
/service/personnel/staff-detai...Quirrenbach, Andreas
http://adsabs.harvard.edu/abs/...External Subdomain A&A 692, A172(2024)
/service/personnel/staff-detai...Sander, A. A. C.;
/service/personnel/staff-detai...Lefever, R. R.
http://adsabs.harvard.edu/abs/...External Subdomain A&A 692, A109(2024)
/service/personnel/staff-detai...Klessen, Ralf S.
http://adsabs.harvard.edu/abs/...External Subdomain ApJ 977, 37(2024)
/publicationsmore publications
A-TITLE Opens internal link in current window
https://www.uni-heidelberg.de/...External Subdomain Imprint
https://www.uni-heidelberg.de/...External Subdomain Privacy statement

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://zah.uni-heidelberg.de/welcome"
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 (1.05 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 7 CSS files. This may affect the page load time negatively.
This page loads 8 JavaScript files. This may affect the load time negatively.
The file size of the HTML document is fine (36 kB).

HTTP Response Header

NameValue
dateFri, 03 Jan 2025 21:28:59 GMT
serverApache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips mod_fcgid/2.3.9 PHP/7.2.34
x-powered-byPHP/7.2.34
content-languageen
cache-controlprivate, no-store
content-length36502
content-typetext/html; charset=utf-8
statuscode200
http_versionHTTP/1.1

External factors

This page is referenced by wikipedia.
This page is very well linked from other websites.
This page has backlinks from 24 referring domains.
This page has 59 backlinks.
This page has backlinks from 22 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

No valid Robots.txt file was found.

Similar sites

Search preview

Most important keywords

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

KeywordResultRecheck
Heidelberg73%Check
Welcome72%Check
Astronomy Heidelberg69%Check
Heidelberg University68%Check
Astronomy66%Check
Centre62%Check
University61%Check
Zentrum47%Check
Astronomie47%Check
ZAH46%Check
Show more keywords and terms

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