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sciences.gsfc.nasa.gov screenshot

Report Summary

  • 26

    Performance

    Renders faster than
    45% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

sciences.gsfc.nasa.gov

Sciences and Exploration Directorate

Page Load Speed

4.2 sec in total

First Response

56 ms

Resources Loaded

3.6 sec

Page Rendered

477 ms

sciences.gsfc.nasa.gov screenshot

About Website

Visit sciences.gsfc.nasa.gov now to see the best up-to-date Sciences Gsfc Nasa content for United States and also check out these interesting facts you probably never knew about sciences.gsfc.nasa.gov

The Sciences and Exploration Directorate home page.

Visit sciences.gsfc.nasa.gov

Key Findings

We analyzed Sciences.gsfc.nasa.gov page load time and found that the first response time was 56 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

sciences.gsfc.nasa.gov performance score

26

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.6 s

0/100

10%

LCP (Largest Contentful Paint)

Value18.0 s

0/100

25%

SI (Speed Index)

Value14.2 s

1/100

10%

TBT (Total Blocking Time)

Value500 ms

58/100

30%

CLS (Cumulative Layout Shift)

Value0.24

52/100

15%

TTI (Time to Interactive)

Value14.5 s

9/100

10%

Network Requests Diagram

sciences.gsfc.nasa.gov

56 ms

sci

1658 ms

material-icons.min.css

198 ms

bootstrap.min.css

79 ms

introjs.css

73 ms

Our browser made a total of 47 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Sciences.gsfc.nasa.gov, 64% (30 requests) were made to Science.gsfc.nasa.gov and 13% (6 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.7 sec) relates to the external source Science.gsfc.nasa.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 848.3 kB (19%)

Content Size

4.4 MB

After Optimization

3.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sciences.gsfc.nasa.gov main page is 4.4 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 3.6 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 563.6 kB

  • Original 665.9 kB
  • After minification 664.9 kB
  • After compression 102.3 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 563.6 kB or 85% of the original size.

Image Optimization

-8%

Potential reduce by 280.5 kB

  • Original 3.6 MB
  • After minification 3.4 MB

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. Sciences Gsfc Nasa images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 835 B

  • Original 106.8 kB
  • After minification 106.8 kB
  • After compression 105.9 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. This website has mostly compressed JavaScripts.

CSS Optimization

-32%

Potential reduce by 3.3 kB

  • Original 10.4 kB
  • After minification 10.4 kB
  • After compression 7.1 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. Sciences.gsfc.nasa.gov needs all CSS files to be minified and compressed as it can save up to 3.3 kB or 32% of the original size.

Requests Breakdown

Number of requests can be reduced by 23 (62%)

Requests Now

37

After Optimization

14

  • Images
  • JavaScript
  • CSS

The browser has sent 37 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sciences Gsfc Nasa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

sciences.gsfc.nasa.gov

sciences.gsfc.nasa.gov

56 ms

sci

sci

1658 ms

material-icons.min.css

material-icons.min.css

198 ms

bootstrap.min.css

bootstrap.min.css

79 ms

introjs.css

introjs.css

73 ms

swiper.min.css

swiper.min.css

86 ms

owl.carousel.min.css

owl.carousel.min.css

72 ms

owl.theme.default.min.css

owl.theme.default.min.css

71 ms

css

css

54 ms

materialdesignicons.min.css

materialdesignicons.min.css

94 ms

Universal-Federated-Analytics-Min.js

Universal-Federated-Analytics-Min.js

40 ms

cse.js

cse.js

67 ms

jquery.min.js

jquery.min.js

106 ms

bootstrap.min.js

bootstrap.min.js

112 ms

jquery.bootstrap-dropdown-hover.js

jquery.bootstrap-dropdown-hover.js

106 ms

rellax.js

rellax.js

105 ms

navigation.js

navigation.js

111 ms

intro.js

intro.js

144 ms

swiper.min.js

swiper.min.js

154 ms

owl.carousel.min.js

owl.carousel.min.js

141 ms

3e2da57.js

3e2da57.js

154 ms

a8fede4.js

a8fede4.js

181 ms

f29513f.js

f29513f.js

320 ms

61be619.js

61be619.js

181 ms

cse_element__en.js

cse_element__en.js

22 ms

default+en.css

default+en.css

54 ms

default.css

default.css

57 ms

M17SwanMaxant_1024.jpg

M17SwanMaxant_1024.jpg

292 ms

landslide_oli2_20240820_th.jpg

landslide_oli2_20240820_th.jpg

338 ms

nasa-logo.png

nasa-logo.png

131 ms

nasa-logo-black.jpg

nasa-logo-black.jpg

132 ms

HighLightID_14338.jpg

HighLightID_14338.jpg

193 ms

starry-sky.png

starry-sky.png

134 ms

HighLightID_12779.jpeg

HighLightID_12779.jpeg

131 ms

TESSGliese12b-nugget20240729.png

TESSGliese12b-nugget20240729.png

533 ms

MagnetophereIonosphereCoupling-nugget20240722.png

MagnetophereIonosphereCoupling-nugget20240722.png

560 ms

OffshoreOperationsNO2-20240715.png

OffshoreOperationsNO2-20240715.png

512 ms

heapow.jpg

heapow.jpg

190 ms

nasa-goddard-logo.png

nasa-goddard-logo.png

136 ms

KFOmCnqEu92Fr1Mu4mxP.ttf

KFOmCnqEu92Fr1Mu4mxP.ttf

57 ms

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

106 ms

KFOlCnqEu92Fr1MmSU5fBBc9.ttf

KFOlCnqEu92Fr1MmSU5fBBc9.ttf

137 ms

KFOkCnqEu92Fr1MmgVxIIzc.ttf

KFOkCnqEu92Fr1MmgVxIIzc.ttf

137 ms

KFOlCnqEu92Fr1MmWUlfBBc9.ttf

KFOlCnqEu92Fr1MmWUlfBBc9.ttf

160 ms

KFOlCnqEu92Fr1MmYUtfBBc9.ttf

KFOlCnqEu92Fr1MmYUtfBBc9.ttf

160 ms

materialdesignicons-webfont.woff

materialdesignicons-webfont.woff

57 ms

glyphicons-halflings-regular.woff

glyphicons-halflings-regular.woff

55 ms

Accessibility Review

sciences.gsfc.nasa.gov accessibility score

85

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-hidden="true"] elements contain focusable descendents

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

sciences.gsfc.nasa.gov best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

sciences.gsfc.nasa.gov SEO score

79

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sciences.gsfc.nasa.gov 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 Sciences.gsfc.nasa.gov 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

sciences.gsfc.nasa.gov

Open Graph description is not detected on the main page of Sciences Gsfc Nasa. 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: