Astro.uni-bonn.de - SEO Checker

Overview of the SEO Check
Meta information
76% 
Page quality
63% 
Page structure
73% 
Link structure
82% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.19 s
File size
12.40 kB
Words
262
Media files
5
Number of links
46 internal / 4 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Argelander-Institut für Astronomie
The length of the page title is perfect. (302 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://astro.uni-bonn.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 specified alternate links have no errors.
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=1400
robotsindex,follow
langde
charsetUTF-8

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Page quality

Content
(Critically important)
There are only 262 words on this page. Good pages should have about 800 words of useful content.
27.1% 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.
5 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 21.8 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=1400" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 6 tags for this page.
Image SEO
(Somewhat important)
3 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

Page structure

H1 heading
(Critically important)
Neues
The H1 heading consists of only one word. There should be more information given.
The H1 heading is too short (5 characters). It should be at least 20 Characters long.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 Neues
H2 Euclid liefert erste wissenschaftliche Ergebnisse
H2 eROSITA löst kosmologische Spannungen
H2 Clusterantrag "Unser dynamisches Universum" geht in die nächste Runde
H2 eROSITA: Der Röntgenhimmel offenbart sich für die Welt
H2 Weltraumteleskop Euclid liefert erste wissenschaftliche Bilder
Some internal link anchor texts are too long.
Some anchor texts are used more than once.
3 links don't have an anchor text.
The number of internal links is ok.
All internal links are not using dynamic parameters.
There are 4 external links on this page.
LinkAttributesAnchor text
https://astro.uni-bonn.de/Willkommen
/de/institutInstitut
/de/institut/mitarbeiterMitarbeiter
/de/institut/kontakt-und-anfahrtKontakt und Anfahrt
/de/institut/DEIDiversity, Equity, Inclusion
/de/institut/it-supportIT-Support
/de/institut/impressumImpressum
/de/institut/datenschutzerklae...Datenschutzerklärung
/de/forschungForschung
/de/forschung/dark-energy-teamDark Energy Team
/de/forschung/radioastronomy-ismRadio Astronomy & Interstellar Medium
/de/forschung/gravitational-le...Gravitational Lensing and Cosmology
/de/forschung/mm-submm-astronomyMillimeter/sub-millimeter astronomy
/de/forschung/radio-and-x-ray-...Radio- and X-ray astronomy
/de/forschung/the-large-scale-...The large-scale structure of the Universe
/de/forschung/stellar-astrophy...Stellar Astrophysics
/de/studiumStudium
/de/studium/informationen-rund...Informationen rund ums Studium
/de/studium/mastervorlesungenMastervorlesungen
/de/studium/astrosemAstroSem
/de/studium/astroclubAstroclub
/de/studium/teleskopTeleskop
/de/studium/cip-poolCIP-Pool
/de/studium/servicesServices
/de/offentlichkeitÖffentlichkeit
/de/offentlichkeit/angebote-fu...Angebote für Schulen und SchülerInnen
/de/offentlichkeit/angebote-fu...Angebote für die Allgemeinheit
/de/offentlichkeit/geschichte-...Geschichte der Bonner Astronomie
/de/forschung/mm-submm-astrono...LEGO-ALMA
/de/offentlichkeit/wissenschaf...Wissenschaftsdialog
https://astro.uni-bonn.de/enEnglish
/de/forschungSubdomain No Text
/de/institutSubdomain No Text
/en/studentsSubdomain No Text
/de/news/2024/05/23/euclid-ero...Euclid liefert erste wissenschaftliche Ergebnisse 23.05.2024 Heute veröffentlicht das Euclid-Projektkonsortium die ersten wissenschaftlichen Publikationen zu...
/de/news/2024/02/14-1/erosita-...eROSITA löst kosmologische Spannungen 14.02.2024 Ergebnisse der ersten eROSITA-Röntgenhimmelsdurchmusterung zeigen Konsistenz, wo frühere Messungen der Struk...
/de/news/2024/02/02-1/clustera...Clusterantrag "Unser dynamisches Universum" geht in die nächste Runde 02.02.2024 Die Cluster-Initiative "Unser dynamisches Universum" ist aufgefordert worden...
/de/news/2024/01/31/erosita-dr...eROSITA: Der Röntgenhimmel offenbart sich für die Welt 31.01.2024 Konsortium mit Bonner Beteiligung macht den bisher größten Katalog hochenergetischer kosmis...
/de/news/2023/11/07/euclid-fir...Weltraumteleskop Euclid liefert erste wissenschaftliche Bilder 07.11.2023 Euclid, das neueste Weltraumteleskop der ESA mit starker deutscher Beteiligung, hat...
/de/institut/kontakt-und-anfahrtAnfahrt
/de/institut/mitarbeiterText duplicate Mitarbeiter
/de/institut/impressumText duplicate Impressum
/de/institut/datenschutzerklae...Text duplicate Datenschutzerklärung
https://intranet.astro.uni-bon...New window External Subdomain Intranet
https://astro.uni-bonn.de/neosNew window Subdomain Login
/download/New window Subdomain Downloads
/links/New window Subdomain Links
http://thenounproject.com/noun...New window External Anchor Podium
http://thenounproject.com/bravoNew window External Juan Pablo Bravo
http://www.uni-bonn.de/External Subdomain Rheinische Friedrich-Wilhelms-Universität Bonn

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://astro.uni-bonn.de/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time is excellent with 0.19 seconds.
The file size of the HTML document is fine (12 kB).

HTTP Response Header

NameValue
content-encodinggzip
content-typetext/html; charset=UTF-8
dateWed, 10 Jul 2024 04:24:17 GMT
servernginx
strict-transport-securitymax-age=31536000; includeSubDomains; preload
varyAccept-Encoding
x-content-type-optionsnosniff
x-flow-poweredFlow/5.3 Neos/4.3
x-frame-optionsSAMEORIGIN
x-xss-protection1; mode=block
content-length3654
statuscode200
http_versionHTTP/2

External factors

Blacklists
(Nice to have)
This website is not classified "for adult only".
This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 960 referring domains.
This page has 3,689 backlinks.
This page has backlinks from 433 different ip addresses.
Facebook popularity
(Somewhat important)
The page has 0 shares and comments on Facebook.

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$

Search preview

Most important keywords

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

KeywordResultRecheck
Institut50%Check
Neues50%Check
Institut für Astronomie50%Check
Astronomie48%Check
Argelander-Institut48%Check
Euclid43%Check
liefert43%Check
wissenschaftliche43%Check
eROSITA43%Check
Welt43%Check

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