Astro.uni-bonn.de - SEO Checker

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Overview of the SEO Check
Meta information
73% 
Page quality
67% 
Page structure
79% 
Link structure
75% 
Server
91% 
External factors
50% 
SEO Score
Response time
0.10 s
File size
103.30 kB
Words
472
Media files
10
Number of links
33 internal / 4 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Argelander-Institut für Astronomie — de
The length of the page title is perfect. (356 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)
https://www.astro.uni-bonn.de/de
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: de
Language defined in HTML: de
Server location: United States of America
The following language is defined by HTML: de
Alternate/Hreflang Links
(Somewhat important)
The alternate link to the page itself is missing.
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)
No favicon is linked in the HTML code.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1.0
generatorPlone - http://plone.com
langde
twitter:cardsummary
og:site_nameArgelander-Institut für Astronomie
og:titleArgelander-Institut für Astronomie
og:typewebsite
og:descriptionEmpty
og:urlhttps://www.astro.uni-bonn.de/de
og:imagehttps://www.astro.uni-bonn.de/@@site-logo/aifa_logo.png
og:image:typeimage/png
Content-Typetext/html; charset=UTF-8
X-UA-CompatibleIE=edge
charsetutf-8

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Page quality

Content
(Critically important)
There are only 472 words on this page. Good pages should have about 800 words of useful content.
32% 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.
12 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 16.32 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
Multiple viewport tags are given. There should only be one.
No Apple touch icon is specified.
A viewport "width=device-width, initial-scale=1.0" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 9 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
/de/@@logo?logo_type=logo_desktopArgelander-Institut für AstronomieArgelander-Institut für Astronomie
...ibonn.theme/images/logos/logo_mobile.svgArgelander-Institut für AstronomieArgelander-Institut für Astronomie
.../images/logos/logo_mobile_navigation.svgArgelander-Institut für AstronomieArgelander-Institut für Astronomie
.../images/logos/logo_mobile_navigation.svgArgelander-Institut für AstronomieArgelander-Institut für Astronomie
...++unibonn.contenttypes/images/avatar.svgAvatar Porciani
...++unibonn.contenttypes/images/avatar.svgAvatar Bigiel
...++unibonn.contenttypes/images/avatar.svgAvatar Sekretariat

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 Astronomie an der Universität Bonn
H2 Nachrichten
H2 Organisation
H2 Kontakt
H3 Fachgruppe Physik-Astronomie
H3 Math.-Nat. Fakultät
H3 Max-Planck-Institut für Radioastronomie
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 4 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://www.uni-bonn.de/External Subdomain Universität Bonn
/@@multilingual-selector/c2810...Subdomain de
A-TITLE Deutsch
/@@multilingual-selector/c2810...Subdomain en
A-TITLE English
https://www.astro.uni-bonn.de/deSubdomain IMG-ALT Argelander-Institut für Astronomie
A-TITLE Argelander-Institut für Astronomie
https://www.astro.uni-bonn.de/deSubdomain Text duplicate IMG-ALT Argelander-Institut für Astronomie
A-TITLE Argelander-Institut für Astronomie
https://www.astro.uni-bonn.de/deSubdomain Text duplicate IMG-ALT Argelander-Institut für Astronomie
A-TITLE Argelander-Institut für Astronomie
/@@multilingual-selector/c2810...Subdomain Text duplicate de
/@@multilingual-selector/c2810...Subdomain Text duplicate en
/de/aktuellesSubdomain Aktuelles
/de/institutSubdomain Institut
/de/studiumSubdomain Studium
/de/forschungSubdomain Forschung und Lehre
https://www.astro.uni-bonn.de/deSubdomain Text duplicate IMG-ALT Argelander-Institut für Astronomie
A-TITLE Argelander-Institut für Astronomie
/de/forschungSubdomain Text duplicate Forschung und Lehre
/de/studiumSubdomain Text duplicate Studium
/de/institut/institutSubdomain AIfA
/de/institut/mitgliederSubdomain Mitarbeiter
/de/studiumSubdomain Text duplicate Studium
/de/forschungSubdomain Forschung
/de/news/clusterantrag-unser-d...Subdomain © Universität Bonn / YouTube
A-TITLE Clusterantrag "Unser dynamisches Universum" geht in die nächste Runde
/de/news/clusterantrag-unser-d...Subdomain Clusterantrag "Unser dynamisches Universum" geht in die nächste Runde
/de/news/clusterantrag-unser-d...Subdomain Text duplicate A-TITLE Clusterantrag "Unser dynamisches Universum" geht in die nächste Runde
/de/news/erosita-loest-kosmolo...Subdomain © M. Kluge, C. Garrel; Optische Wellenlängen: Legacy Survey DR10, Röntgen: eROSITA
A-TITLE Ergebnisse der ersten Erosita-Röntgenhimmelsdurchmusterung
/de/news/erosita-loest-kosmolo...Subdomain Ergebnisse der ersten Erosita-Röntgenhimmelsdurchmusterung
/de/news/erosita-loest-kosmolo...Subdomain Text duplicate A-TITLE Ergebnisse der ersten Erosita-Röntgenhimmelsdurchmusterung
/de/news/euclid-liefert-erste-...Subdomain © ESA/Euclid/Euclid Consortium/NASA, Bildbearbeitung durch J.-C. Cuillandre, G. Anselmi; CC BY-SA 3.0 IGO
A-TITLE Euclid liefert erste wissenschaftliche Ergebnisse
/de/news/euclid-liefert-erste-...Subdomain Euclid liefert erste wissenschaftliche Ergebnisse
/de/news/euclid-liefert-erste-...Subdomain Text duplicate A-TITLE Euclid liefert erste wissenschaftliche Ergebnisse
/de/nachrichtenubersichtSubdomain Alle Nachrichten
/de/aktuelles/veranstaltungen/...Subdomain © COLOURBOX Samstag 16.11.2024
/de/aktuelles/veranstaltungen/...Subdomain Lehrkräfte-Fortbildung
/de/aktuelles/veranstaltungen/...Subdomain Text duplicate A-TITLE Lehrkräfte-Fortbildung
/de/aktuelles/veranstaltungenNew window Subdomain Alle Veranstaltungen
https://www.physik-astro.uni-b...New window External Subdomain Fachgruppe Physik-Astronomie
https://www.mnf.uni-bonn.de/External Subdomain Fakultät
https://www.mpifr-bonn.mpg.de/New window External Subdomain Max-Planck-Institut
/de/institut/mitgliederSubdomain Alle Mitarbeiter

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.astro.uni-bonn.de/de"
HTTP header
(Important)
The X-powered header is sent within the response header. (unnecessary)
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time is excellent with 0.10 seconds.
The file size of the HTML document is fine (103 kB).

HTTP Response Header

NameValue
accept-rangesbytes
age39941
allowGET, POST, HEAD, PUT, PURGE, DELETE
cache-controlmax-age=0, s-maxage=86400, must-revalidate
content-encodinggzip
content-languagede
content-security-policydefault-src 'self' https://*.rhrz.uni-bonn.de; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://*.rhrz.uni-bonn.de https://*.hrz.uni-bonn.de https://www.youtube.com https://s.ytimg.com https://maps.google.com https://maps.googleapis.com https://apis.google.com https://ajax.googleapis.com https://pjdcqgnb0lmk.statuspage.io https://*.siteimprove.com; img-src 'self' data: https://*.rhrz.uni-bonn.de https://i.ytimg.com https://maps.gstatic.com https://maps.google.com https://www.uni-bonn.de https://*.googleapis.com https://*.uni-bonn.de https://*.youtube.com https://uni-bn.de/ https://*.siteimprove.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com https://*.siteimprove.com data:; object-src 'self' blob:; frame-src 'self' https://*.uni-bonn.de:* https://www.youtube.com https://www.youtube-nocookie.com https://content-youtube.googleapis.com https://content.googleapis.com https://pjdcqgnb0lmk.statuspage.io mailto://*; frame-ancestors 'self' https://*.uni-bonn.de; connect-src 'self' https://shortener.rhrz.uni-bonn.de https://apis.google.com https://uni-bn.de https://webstat.hrz.uni-bonn.de https://cms-proxy.uni-bonn.de;
content-typetext/html;charset=utf-8
dateMon, 14 Oct 2024 02:11:13 GMT
etagW/"|1728301896.0"
expiresThu, 16 Oct 2014 15:05:31 GMT
servernginx
strict-transport-securitymax-age=31536000; includeSubDomains; preload
varyAccept-Encoding
via1.0 astro.uni-bonn.de
x-apacheplone5-0045-backend.iaas.uni-bonn.de
x-cacheHIT
x-cache-hits20
x-cache-operationplone.app.caching.moderateCaching
x-cache-ruleplone.content.itemView
x-cacheableYES
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN
x-powered-byZope (www.zope.dev), Python (www.python.org)
x-xss-protection1; mode=block
content-length11602
statuscode200
http_versionHTTP/2

External factors

This page has only a few links from other websites.
This page is referenced by wikipedia.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

Sitemap: https://www.astro.uni-bonn.de/sitemap.xml.gz

# Define access-restrictions for robots/spiders
# http://www.robotstxt.org/wc/norobots.html



# By default we allow robots to access all areas of our site
# already accessible to anonymous users

User-agent: *
Disallow:



# Add Googlebot-specific syntax extension to exclude forms
# that are repeated for each piece of content in the site
# the wildcard is only supported by Googlebot
# http://www.google.com/support/webmasters/bin/answer.py?answer=40367&ctx=sibling

User-Agent: Googlebot
Disallow: /*?
Disallow: /*atct_album_view$
Disallow: /*folder_factories$
Disallow: /*folder_summary_view$
Disallow: /*login_form$
Disallow: /*mail_password_form$
Disallow: /@@search
Disallow: /*search_rss$
Disallow: /*sendto_form$
Disallow: /*summary_view$
Disallow: /*thumbnail_view$
Disallow: /*view$

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Most important keywords

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

KeywordResultRecheck
Astronomie58%Check
Institut54%Check
Argelander-Institut50%Check
Bonn48%Check
Physik und Astronomie45%Check
Universität Bonn43%Check
uni-bonn42%Check
Max-Planck-Institut38%Check
Fachgruppe38%Check
Physik38%Check
Show more keywords and terms

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