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telescope.org screenshot

Report Summary

  • 61

    Performance

    Renders faster than
    76% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

telescope.org

OpenScience Observatories

Page Load Speed

2.8 sec in total

First Response

640 ms

Resources Loaded

2 sec

Page Rendered

139 ms

telescope.org screenshot

About Website

Welcome to telescope.org homepage info - get ready to check Telescope best content for Greece right away, or after learning these important things about telescope.org

Use a real telescope on Mount Teide, Tenerife, with just your web browser

Visit telescope.org

Key Findings

We analyzed Telescope.org page load time and found that the first response time was 640 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

telescope.org performance score

61

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value5.1 s

25/100

25%

SI (Speed Index)

Value6.7 s

36/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value6.4 s

59/100

10%

Network Requests Diagram

www.telescope.org

640 ms

jquery-1.11.2.min.js

263 ms

jquery-ui.min.js

402 ms

int.1430495198.css

171 ms

index-int-all.1399470518.css

177 ms

Our browser made a total of 23 requests to load all elements on the main page. We found that all of those requests were addressed to Telescope.org and no external sources were called. The less responsive or slowest element that took the longest time to load (676 ms) belongs to the original domain Telescope.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 302.6 kB (36%)

Content Size

850.2 kB

After Optimization

547.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Telescope.org main page is 850.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 30% of websites need less resources to load. Images take 477.2 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 16.9 kB

  • Original 22.5 kB
  • After minification 19.9 kB
  • After compression 5.6 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 2.5 kB, which is 11% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 16.9 kB or 75% of the original size.

Image Optimization

-7%

Potential reduce by 34.0 kB

  • Original 477.2 kB
  • After minification 443.2 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Telescope images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 229.7 kB

  • Original 324.0 kB
  • After minification 324.0 kB
  • After compression 94.4 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 229.7 kB or 71% of the original size.

CSS Optimization

-83%

Potential reduce by 22.0 kB

  • Original 26.4 kB
  • After minification 20.4 kB
  • After compression 4.4 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Telescope.org needs all CSS files to be minified and compressed as it can save up to 22.0 kB or 83% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

22

After Optimization

22

  • Images
  • JavaScript
  • CSS

The browser has sent 22 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Telescope. According to our analytics all requests are already optimized.

Network Requests Diagram

www.telescope.org

www.telescope.org

640 ms

jquery-1.11.2.min.js

jquery-1.11.2.min.js

263 ms

jquery-ui.min.js

jquery-ui.min.js

402 ms

int.1430495198.css

int.1430495198.css

171 ms

index-int-all.1399470518.css

index-int-all.1399470518.css

177 ms

header-2012-left.png

header-2012-left.png

85 ms

reino_unido.png

reino_unido.png

87 ms

portugal.png

portugal.png

168 ms

index-1.jpg

index-1.jpg

169 ms

lunar-eclipse.png

lunar-eclipse.png

335 ms

open-university-2.jpg

open-university-2.jpg

252 ms

newrc.jpg

newrc.jpg

171 ms

index-features.jpg

index-features.jpg

252 ms

NGC4565.jpg

NGC4565.jpg

253 ms

v3imagegallery-i.php

v3imagegallery-i.php

338 ms

webcam-tn-domecam-i.php

webcam-tn-domecam-i.php

666 ms

weather-icon.php

weather-icon.php

676 ms

moon-icon.php

moon-icon.php

342 ms

uob-2015.png

uob-2015.png

338 ms

ppdonate.png

ppdonate.png

415 ms

header-2012-right.png

header-2012-right.png

667 ms

toplineuserimgs2.png

toplineuserimgs2.png

418 ms

NavIcons_spaced.png

NavIcons_spaced.png

417 ms

Accessibility Review

telescope.org accessibility score

93

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

telescope.org best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

telescope.org SEO score

77

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Telescope.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Telescope.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

telescope.org

Open Graph description is not detected on the main page of Telescope. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: