23.4 sec in total
10 ms
982 ms
22.4 sec
Click here to check amazing NASA content for United States. Otherwise, check out these important facts you probably never knew about nasa.gov
NASA.gov brings you the latest news, images and videos from America's space agency, pioneering the future in space exploration, scientific discovery and aeronautics research.
Visit nasa.govWe analyzed Nasa.gov page load time and found that the first response time was 10 ms and then it took 23.4 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.
nasa.gov performance score
name
value
score
weighting
Value2.9 s
53/100
10%
Value14.3 s
0/100
25%
Value14.3 s
1/100
10%
Value580 ms
51/100
30%
Value0
100/100
15%
Value24.4 s
0/100
10%
10 ms
125 ms
12 ms
30 ms
36 ms
Our browser made a total of 87 requests to load all elements on the main page. We found that 64% of them (56 requests) were addressed to the original Nasa.gov, 16% (14 requests) were made to Science.nasa.gov and 5% (4 requests) were made to Images-assets.nasa.gov. The less responsive or slowest element that took the longest time to load (602 ms) relates to the external source Images-assets.nasa.gov.
Page size can be reduced by 5.7 MB (12%)
48.1 MB
42.3 MB
In fact, the total size of Nasa.gov main page is 48.1 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. 85% 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 47.3 MB which makes up the majority of the site volume.
Potential reduce by 292.3 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 292.3 kB or 89% of the original size.
Potential reduce by 5.3 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. Obviously, NASA needs image optimization as it can save up to 5.3 MB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 146.3 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 146.3 kB or 37% of the original size.
Potential reduce by 92 B
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. Nasa.gov needs all CSS files to be minified and compressed as it can save up to 92 B or 16% of the original size.
Number of requests can be reduced by 14 (17%)
81
67
The browser has sent 81 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 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 as a result speed up the page load time.
nasa.gov
10 ms
www.nasa.gov
125 ms
12 ms
30 ms
Universal-Federated-Analytics-Min.js
36 ms
slick.css
22 ms
24 ms
i18n.min.js
26 ms
loader.js
26 ms
p.js
289 ms
27 ms
js
340 ms
analytics.js
304 ms
iframe_api
332 ms
gateway.min.js
376 ms
gtm.js
497 ms
nasa-logo@2x.png
274 ms
photo-4-amur-tigers-credit-dale-miquelle.jpg
477 ms
AFRC2023-0064-02~large.jpg
602 ms
solar-system-illustration-16x9-1.jpg
332 ms
hubble-ic776-potw2418a.jpg
516 ms
europa-clipper-19c754.jpg
560 ms
snoopi-cubsat-image3.jpg
489 ms
pia06890-our-solar-system-banner-1920x640-1.jpg
470 ms
resolve-detector.jpg
486 ms
milkyway-desrt-tree-credit-preston-dyches.jpg
578 ms
coma-cluster-jpg.webp
480 ms
blackhole-binary-mainsequence-jpg.webp
489 ms
spiral-galaxy-jpg.webp
495 ms
lp79118d-beautyshot-jpg.webp
496 ms
icescapepondsample-lrg-jpg.webp
506 ms
ngc5068-1-flat-final.jpg
561 ms
stsci-01h44ay5ztcv1npb227b2p650j-temp.png
553 ms
iss057e055500~large.jpg
533 ms
KSC-20191104-PH-JSC01_0015~orig.jpg
539 ms
KSC-20181111-PH_BOE01_0002~large.jpg
534 ms
expand_more.svg
81 ms
starliner-crew.jpg
104 ms
wff-2024-021-484.jpg
115 ms
billy-stover-and-butch-wilmore-at-ncaa-ceremony-1.jpg
106 ms
1-viking-mars-globe.jpg
103 ms
1-colorado-river.jpg
114 ms
hi-res-cloverleaf-500dpi-crop.png
128 ms
19728525494-4e20319b8c-c.jpg
115 ms
explore-flight-HI-RES-no-meatball.jpg
116 ms
dart-1.jpg
127 ms
casba.png
150 ms
sts093-321-026-web.jpg
147 ms
1-julia-chavez-conducting-an-experiment.jpg
127 ms
12th-grade-lee-esther-beyond-imagination-untitled-artwork.jpeg
150 ms
aapi_2021_22_chiao_after_landing_jsc2005e17946.jpg
156 ms
51732141513-ebd913d411-k.jpg
157 ms
astronaut_candidate_marcos_berrios.jpg
157 ms
52096151486-95454d1d04-o.webp
199 ms
lp8909c5-1200-jpeg.webp
195 ms
66149.jpg
204 ms
52096151486-95454d1d04-o.webp
194 ms
lp8909c5-1200-jpeg.webp
197 ms
66149.jpg
196 ms
starliner.jpg
197 ms
52308729689-a0449d5ce4-b.jpg
201 ms
fl-grad-student.png
201 ms
aapi_2021_22_chiao_after_landing_jsc2005e17946.jpg
202 ms
hubble-ic776-potw2418a.jpg
215 ms
26418799596-88e8873f9a-k.jpg
209 ms
nhq202012170005large.jpg
206 ms
52647409385_0e66e2334e_o.jpeg
204 ms
acd23-0134-003.jpg
206 ms
jsc2023e040107.jpg
206 ms
s69-28578_0.jpg
208 ms
danaweigel-jsc2024e023417-crop.jpg
209 ms
99 ms
PublicSans-Regular.woff
113 ms
PublicSans-Light.woff
111 ms
PublicSans-ExtraLight.woff
111 ms
PublicSans-Bold.woff
109 ms
melissakirvenbrooks-acd24-0032-002.jpg
110 ms
meghaneverett-jsc2024e019923.jpg
104 ms
webb-tarantula-neb.png
211 ms
jsc2022e046413_orig.jpg
104 ms
topic-humans-in-space.jpg
102 ms
aero-topic-card.jpg
98 ms
nasa_technology1.png
93 ms
collect
55 ms
www-widgetapi.js
46 ms
fs.utils.js
34 ms
fs.compress.js
45 ms
nasa.gov accessibility score
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
Buttons do not have an accessible name
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
nasa.gov best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
nasa.gov SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
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
Document uses legible font sizes
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Nasa.gov 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 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.
nasa.gov
Open Graph data is detected on the main page of NASA. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: