Tools & Wizards About Us
spacetelescopes.com screenshot

Report Summary

  • 87

    Performance

    Renders faster than
    90% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

spacetelescopes.com

Page Load Speed

5.2 sec in total

First Response

485 ms

Resources Loaded

4.2 sec

Page Rendered

487 ms

spacetelescopes.com screenshot

About Website

Click here to check amazing Spacetelescopes content. Otherwise, check out these important facts you probably never knew about spacetelescopes.com

Space Telescopes is a complete source of information about space telescopes, NASA, space shuttle, space station, Hubble, astronomy, universe, outer space, Ngst news.

Visit spacetelescopes.com

Key Findings

We analyzed Spacetelescopes.com page load time and found that the first response time was 485 ms and then it took 4.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

spacetelescopes.com performance score

87

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

67/100

10%

LCP (Largest Contentful Paint)

Value2.5 s

89/100

25%

SI (Speed Index)

Value2.6 s

97/100

10%

TBT (Total Blocking Time)

Value60 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.204

61/100

15%

TTI (Time to Interactive)

Value3.6 s

91/100

10%

Network Requests Diagram

spacetelescopes.com

485 ms

buttons.js

153 ms

show_ads.js

72 ms

widgets.js

183 ms

onejs

118 ms

Our browser made a total of 79 requests to load all elements on the main page. We found that 6% of them (5 requests) were addressed to the original Spacetelescopes.com, 10% (8 requests) were made to Apis.google.com and 10% (8 requests) were made to Ecx.images-amazon.com. The less responsive or slowest element that took the longest time to load (2.1 sec) relates to the external source Ecx.images-amazon.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 315.3 kB (58%)

Content Size

543.4 kB

After Optimization

228.1 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Spacetelescopes.com main page is 543.4 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. 40% of websites need less resources to load. Javascripts take 327.2 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 79.9 kB

  • Original 105.2 kB
  • After minification 100.1 kB
  • After compression 25.2 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 79.9 kB or 76% of the original size.

Image Optimization

-17%

Potential reduce by 18.8 kB

  • Original 111.0 kB
  • After minification 92.2 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. Obviously, Spacetelescopes needs image optimization as it can save up to 18.8 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-66%

Potential reduce by 216.5 kB

  • Original 327.2 kB
  • After minification 326.5 kB
  • After compression 110.7 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 216.5 kB or 66% of the original size.

Requests Breakdown

Number of requests can be reduced by 51 (67%)

Requests Now

76

After Optimization

25

  • AJAX
  • Images
  • JavaScript

The browser has sent 76 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Spacetelescopes. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 28 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

spacetelescopes.com

spacetelescopes.com

485 ms

buttons.js

buttons.js

153 ms

show_ads.js

show_ads.js

72 ms

widgets.js

widgets.js

183 ms

onejs

onejs

118 ms

date.js

date.js

229 ms

q

q

215 ms

q

q

226 ms

q

q

252 ms

ca-pub-7528899509053463.js

ca-pub-7528899509053463.js

246 ms

zrt_lookup.html

zrt_lookup.html

262 ms

show_ads_impl.js

show_ads_impl.js

259 ms

space.gif

space.gif

144 ms

hubble.jpg

hubble.jpg

465 ms

copyright.jpg

copyright.jpg

248 ms

plusone.js

plusone.js

688 ms

getad

getad

1147 ms

json

json

215 ms

FormMail.php

FormMail.php

1396 ms

a-logo-amazon.png

a-logo-amazon.png

474 ms

41UihaXtFQL._AC_SR98,95_.jpg

41UihaXtFQL._AC_SR98,95_.jpg

521 ms

ir

ir

168 ms

prime.png

prime.png

167 ms

cart.gif

cart.gif

411 ms

json

json

160 ms

json

json

146 ms

31rRt1ErkDL._AC_SR98,95_.jpg

31rRt1ErkDL._AC_SR98,95_.jpg

2149 ms

41hyBbZOX8L._AC_SR98,95_.jpg

41hyBbZOX8L._AC_SR98,95_.jpg

475 ms

json

json

126 ms

ads

ads

278 ms

osd.js

osd.js

104 ms

abg.js

abg.js

318 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

275 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

224 ms

fastbutton

fastbutton

364 ms

postmessageRelay

postmessageRelay

233 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

296 ms

cb=gapi.loaded_1

cb=gapi.loaded_1

49 ms

amzn-widgets-sprite-2x.png

amzn-widgets-sprite-2x.png

215 ms

resolve

resolve

84 ms

amznassocview.js

amznassocview.js

151 ms

1077434459-postmessagerelay.js

1077434459-postmessagerelay.js

253 ms

rpc:shindig_random.js

rpc:shindig_random.js

113 ms

json

json

43 ms

60 ms

ir

ir

52 ms

41lvmfTPfAL._AC_SL115_.jpg

41lvmfTPfAL._AC_SL115_.jpg

58 ms

41Hsni7nd8L._AC_SL115_.jpg

41Hsni7nd8L._AC_SL115_.jpg

111 ms

510wI1bmXwL._AC_SL115_.jpg

510wI1bmXwL._AC_SL115_.jpg

540 ms

51n47tYhYoL._AC_SL115_.jpg

51n47tYhYoL._AC_SL115_.jpg

563 ms

%7B%22adViewability%22:[%7B%22above_the_fold%22:%20true,%20%22topPos%22:%200.4838095238095238,%20%22leftPos%22:%200.29345238095238096%7D]%7D&cb=1770188

%7B%22adViewability%22:[%7B%22above_the_fold%22:%20true,%20%22topPos%22:%200.4838095238095238,%20%22leftPos%22:%200.29345238095238096%7D]%7D&cb=1770188

94 ms

challenge

challenge

180 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

737 ms

challenge

challenge

165 ms

recaptcha.js

recaptcha.js

160 ms

51n47tYhYoL._AC_SL235_.jpg

51n47tYhYoL._AC_SL235_.jpg

221 ms

GNfFygb3LDrD0zSD-EFghKRnrpEJpzYWg0G3FDPfY2w.js

GNfFygb3LDrD0zSD-EFghKRnrpEJpzYWg0G3FDPfY2w.js

99 ms

bg_logo.gif

bg_logo.gif

301 ms

counter.js

counter.js

157 ms

t.php

t.php

149 ms

button.71000885400e222c3c0eec823f8f93f0.js

button.71000885400e222c3c0eec823f8f93f0.js

188 ms

getAllAppDefault.esi

getAllAppDefault.esi

280 ms

reload

reload

46 ms

image

image

114 ms

tweet_button.fd774b599f565016d763dd860cb31c79.en.html

tweet_button.fd774b599f565016d763dd860cb31c79.en.html

269 ms

getSegment.php

getSegment.php

246 ms

checkOAuth.esi

checkOAuth.esi

119 ms

jot

jot

249 ms

t.dhj

t.dhj

66 ms

t.dhj

t.dhj

45 ms

cm

cm

152 ms

x35248

x35248

414 ms

s-3271.xgi

s-3271.xgi

32 ms

hbpix

hbpix

269 ms

125 ms

pixel

pixel

183 ms

92 ms

2981

2981

97 ms

xrefid.xgi

xrefid.xgi

48 ms

Accessibility Review

spacetelescopes.com accessibility score

63

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

<frame> or <iframe> elements do not have a title

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

spacetelescopes.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

General

Impact

Issue

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

spacetelescopes.com SEO score

83

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Page is blocked from indexing

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 doesn't use legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Spacetelescopes.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Spacetelescopes.com main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

spacetelescopes.com

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