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astroviewer.com screenshot

Report Summary

  • 99

    Performance

    Renders faster than
    96% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 97

    SEO

    Google-friendlier than
    91% of websites

astroviewer.com

Find planets and constellations in the night sky - AstroViewer-Sternenkarte

Page Load Speed

2.3 sec in total

First Response

387 ms

Resources Loaded

1.7 sec

Page Rendered

168 ms

astroviewer.com screenshot

About Website

Visit astroviewer.com now to see the best up-to-date Astro Viewer content for United States and also check out these interesting facts you probably never knew about astroviewer.com

Find planets, stars and constellations quickly and easily in the night sky with the AstroViewer night sky map

Visit astroviewer.com

Key Findings

We analyzed Astroviewer.com page load time and found that the first response time was 387 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

astroviewer.com performance score

99

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

95/100

10%

LCP (Largest Contentful Paint)

Value1.6 s

99/100

25%

SI (Speed Index)

Value2.0 s

99/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.6 s

100/100

10%

Network Requests Diagram

astroviewer.com

387 ms

index.php

692 ms

av.css

111 ms

av-logo3.gif

206 ms

affiliat-150x600-en.jpg

652 ms

Our browser made a total of 18 requests to load all elements on the main page. We found that all of those requests were addressed to Astroviewer.com and no external sources were called. The less responsive or slowest element that took the longest time to load (692 ms) belongs to the original domain Astroviewer.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 31.3 kB (26%)

Content Size

121.4 kB

After Optimization

90.1 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Astroviewer.com main page is 121.4 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. Only 5% of websites need less resources to load. Images take 84.5 kB which makes up the majority of the site volume.

HTML Optimization

-69%

Potential reduce by 4.3 kB

  • Original 6.2 kB
  • After minification 5.2 kB
  • After compression 1.9 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 1.0 kB, which is 17% 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 4.3 kB or 69% of the original size.

Image Optimization

-0%

Potential reduce by 8 B

  • Original 84.5 kB
  • After minification 84.5 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. Astro Viewer images are well optimized though.

CSS Optimization

-88%

Potential reduce by 27.0 kB

  • Original 30.7 kB
  • After minification 8.3 kB
  • After compression 3.7 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. Astroviewer.com needs all CSS files to be minified and compressed as it can save up to 27.0 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (44%)

Requests Now

16

After Optimization

9

  • Images
  • CSS

The browser has sent 16 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Astro Viewer. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

astroviewer.com

astroviewer.com

387 ms

index.php

index.php

692 ms

av.css

av.css

111 ms

av-logo3.gif

av-logo3.gif

206 ms

affiliat-150x600-en.jpg

affiliat-150x600-en.jpg

652 ms

base.css

base.css

105 ms

nav_slidingdoor.css

nav_slidingdoor.css

199 ms

basemod.css

basemod.css

204 ms

basemod_av.css

basemod_av.css

210 ms

content.css

content.css

314 ms

print_100_draft.css

print_100_draft.css

206 ms

print_base.css

print_base.css

104 ms

bg_blue.gif

bg_blue.gif

103 ms

bg.gif

bg.gif

108 ms

left3_on.gif

left3_on.gif

110 ms

right3_on.gif

right3_on.gif

107 ms

left3.gif

left3.gif

106 ms

right3.gif

right3.gif

207 ms

Accessibility Review

astroviewer.com accessibility score

100

Accessibility Issues

Best Practices

astroviewer.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

astroviewer.com SEO score

97

Search Engine Optimization Advices

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

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 Astroviewer.com 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 Astroviewer.com 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

astroviewer.com

Open Graph description is not detected on the main page of Astro Viewer. 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: