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SEO Report for

November 29, 2019 11:22 PM
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• Category
Science  >  Space / Astronomy
• Online since
February 6, 1991 (explore Wayback Machine)
• Age
29 years, 11 months, 25 days
• Alexa Rank
#82.427, is in the world's top 100.000 websites!


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SSL Certificate
Great, this website is SSL secured (HTTPS).
The certificate issued by Verein zur Foerderung eines Deutschen Forschungsnetzes e. V. is valid from May 16, 2019 to August 17, 2021.
Title Tag
Length: 3 (recommended: 10 to 70)
Meta Description
ESO, European Organisation for Astronomical Research in the Southern Hemisphere
Length: 79 (recommended: 50 to 160)
Google preview
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ESO, European Organisation for Astronomical Research in the Southern Hemisphere

Mobile Version

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ESO, European Organisation for Astronomical Research in the Southern Hemisphere

Great, language/character encoding is specified: utf-8
URL Resolve

Great, a redirect is in place to redirect traffic from your non-preferred domain. All versions of your page point to the same URL.

URL Parameters
Great, the domain URLs look clean.
Attribute Value
viewport width=device-width, initial-scale=1
robots index,follow


The owner has associated the following topics to the website.

The results of our semantic analysis are shown below using the website's language.

They are the main concepts covered by

Each concept has a confidence score. The higher it is, the more important the topic is relative to the page.

European Southern Observatory Confidence: 80% Arrow up

The European Southern Observatory (ESO, formally: European Organization for Astronomical Research in the Southern Hemisphere) is a 16-nation intergovernmental research organization for ground-based astronomy.

Created in 1962, ESO has provided astronomers with state-of-the-art research facilities and access to the southern sky.

The organisation employs about 730 staff members and receives annual member state contributions of approximately €131 million.

Its observatories are located in northern Chile.

Southern Hemisphere Confidence: 79% Arrow up

The Southern Hemisphere is the half sphere of Earth which is south of the equator.

It contains all or parts of five continents (Antarctica, Australia, about 90% of South America, the southern third of Africa, and several southern islands off the continental mainland of Asia), four oceans (Indian, South Atlantic, Southern, and South Pacific) and most of the Pacific Islands in Oceania.

Its surface is 80.9% water, compared with 60.7% water in the case of the Northern Hemisphere, and it contains 32.7% of Earth's land.

Astronomy Confidence: 74% Arrow up

Astronomy (from Greek: αστρονομία) is a natural science that studies celestial objects and phenomena.

It applies mathematics, physics, and chemistry, in an effort to explain the origin of those objects and phenomena and their evolution.

Objects of interest include planets, moons, stars, galaxies, and comets; while the phenomena include supernovae explosions, gamma ray bursts, and cosmic microwave background radiation.

More generally, all astronomical phenomena that originate outside Earth's atmosphere are within the purview of astronomy.

A related but distinct subject, physical cosmology, is concerned with the study of the Universe as a whole.

European Space Agency Confidence: 72% Arrow up

The European Space Agency (ESA; ASE) is an intergovernmental organisation of 22 member states, dedicated to the exploration of space.

Established in 1975 and headquartered in Paris, France, ESA has a worldwide staff of about 2,000 and an annual budget of about €5.25 billion / US$5.77 billion (2016).

Research Confidence: 69% Arrow up

Research comprises "creative work undertaken on a systematic basis in order to increase the stock of knowledge, including knowledge of humans, culture and society, and the use of this stock of knowledge to devise new applications." It is used to establish or confirm facts, reaffirm the results of previous work, solve new or existing problems, support theorems, or develop new theories.

A research project may also be an expansion on past work in the field.

Research projects can be used to develop further knowledge on a topic, or in the example of a school research project, they can be used to further a student's research prowess to prepare them for future jobs or reports.

To test the validity of instruments, procedures, or experiments, research may replicate elements of prior projects or the project as a whole.

The primary purposes of basic research (as opposed to applied research) are documentation, discovery, interpretation, or the research and development (R&D) of methods and systems for the advancement of human knowledge.

Approaches to research depend on epistemologies, which vary considerably both within and between humanities and sciences.

There are several forms of research: scientific, humanities, artistic, economic, social, business, marketing, practitioner research, life, technological,etc.

WEBSITE SPEED website speed is very slow. Page speed is important for visitors and search engines.

Get insights to improve your page loading time.

Page Loading Time


This domain loads at the median speed of 0.8 seconds.

Speed Percentile

88% is faster than approximately 88 percent of the web. Your website page speed needs to be as fast as you can make it, without compromising the customer experience.

A good goal to achieve is a loading time of 2 seconds on desktop and mobile devices.


This website is ranked #82.427 by Alexa.

This rank is traffic based. The lower the rank is, the better the domain is ranked.

Alexa data for

Daily visitors by country

  • daily visitors distribution - Total: 7 countries
  • Flag for IndiaIndia (3.5%)
  • Flag for Russian FederationRussian Federation (3.8%)
  • Flag for United States of AmericaUnited States of America (14.1%)
  • Flag for Iran (Islamic Republic of)Iran (Islamic Republic of) (3.7%)
  • Flag for United Kingdom of Great Britain and Northern IrelandUnited Kingdom of Great Britain and Northern Ireland (12.4%)
  • Flaf icon for other countryOthers (62.5%)

Traffic country ranks

Country Rank
Flag for IndiaIndia #186.503
Flag for Russian FederationRussian Federation #45.123
Flag for PakistanPakistan #61.335
Flag for United States of AmericaUnited States of America #105.293
Flag for KyrgyzstanKyrgyzstan #1.922


Doctype HTML5 Arrow Responsive website, mobile-friendly. Arrow

Mobile Rendering

This website seems to be optimized for Mobile Visitors.

How looks like on a mobile device such as an iPhone.

How looks like on a tablet such as an iPad.

Main colors used

These are the main HTML color codes used by this website. Arrow
  • 73% #000000
  • 11% #f0f0f0
  • 4% #ffffff
  • 2% #80b0e0
  • 2% #f0f0ff
  • 1% #f0ffff
  • 1% #fffff0
  • 1% #6090c0
  • 0% #fff0f0
  • 0% #206080
  • 0% #000010
  • 0% #a0d0f0

Text/code ratio's text/code ratio is 11.64%. It's a bit low. Consider raising it by adding more text content of value for your visitors, or keeping your code clean.
Text / Code Ratio 11.64%

A good text to HTML ratio is anywhere from 25 to 70%.

This percentage refers to the visible text ratio, as opposed to HTML elements, image tags and other non-visible information.

Main HTML tags

Headings Arrow up

Great, we found headings on this page.

  • <H1> 12
  • <H2> 12
  • <H3> 0
  • <H4> 0
  • <H5> 0
  • <H6> 0
Top level heading
The mystery of the darkening sky (2)
ıllustrating the cosmos (2)
Remembering lodewijk woltjer
50 years of ccds
Witnessing the birth of planets
2nd level heading
A story of solar eclipses throughout history (2)
Eso’s visual artists on how they recreate the universe (2)
Eso staff pay tribute to former director general (2)
The story of a detector that changed the course of astronomy
Astronomer jos de boer on how he searches for baby planets around young stars
Alt attributes Arrow up

We found 515 images on this website.
1 ALT attributes are missing on your image tags.

Image Image URL Occurrences
Image with missing alt attribute found on /public/archives/static/frontpage/apex.jpg 1

Alternative text allows you to add a description to an image.

Google rely on alternative text attributes to determine relevance to a search query. Alternative text also makes an image more likely to appear in a Google image search.

It looks like you're missing alternative text for 1 images on Check your website to make sure it's specified for each image on the page.


This is an overview of your homepage shares on social networks.

You have a relatively high presence on social media, keep going!

The more people share your website, the more likely you will get links from others, which is a key point when it comes to improving your overall search engine rankings.

  • Facebook iconFacebook
  • Total Engagement 2.290
  • Likes 793
  • Shares 1.277
  • Comments 220
  • Pinterest iconPinterest 0
  • Linkedin iconLinkedin 0
  • Stumbleupon iconStumbleupon 0


Domain Registrar KEY-SYSTEMS GMBH
Registration Date 02/06/1991 29 years, 11 months, 25 days ago
Last Modified 10/21/2019 1 year, 3 months, 7 days ago
Nameservers Arrow up
Host IP Address Country Flag for ChileChile Flag for GermanyGermany Flag for ChileChile


Server map
  • Service Provider (ISP)
  • ESO
  • IP Address
  • Country
  • Flag for GermanyGermany
  • Region
  • Bavaria , Garching bei Munchen
  • Latitude and Longitude
  • 48.2603 : 11.6709