nasa.gov NASA

Mobile Usability

95/100

Good

Mobile Speed

8/100

Bad

Last tested: 2017-08-27

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nasa.gov Mobile Usability: 95/100
nasa.gov Mobile Usability Test Quick Overview

Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target <input id="ember869" type="text" name="query" class="ember-view ember-text-field"> is close to 1 other tap targets.
The tap target <a id="follow" href="#" class="addthis_button_compact at300m"></a> is close to 1 other tap targets.
The tap target <a href="https://www.na…e-station-crew">Wednesday, May…e Station Crew</a> and 6 others are close to other tap targets.
The tap target <a href="https://www.nasa.gov/station">Friday, May 12…n 51 Spacewalk</a> is close to 3 other tap targets.
The tap target <a href="http://odeo.hq…ov/nofear.html">No Fear Act</a> and 5 others are close to other tap targets.
nasa.gov Mobile Speed: 8/100
nasa.gov Mobile Speed Test Quick Overview

Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 2.3MiB (77% reduction).
Compressing https://www.nasa.gov/sites/all/themes/custom/nasatwo/js/vendor.js?oo2668 could save 2.3MiB (77% reduction).
Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 1.6MiB (50% reduction).
Minifying https://www.nasa.gov/sites/all/themes/custom/nasatwo/js/vendor.js?oo2668 could save 1.5MiB (51% reduction).
Minifying https://www.nasa.gov/sites/all/themes/custom/nasatwo/js/nasa.js?oo2668 could save 20.9KiB (22% reduction) after compression.
Minifying https://www.nasa.gov/sites/all/modules/contributed…query.reject.js?oo2668 could save 3KiB (48% reduction) after compression.
Minifying https://gateway.answerscloud.com/nasa-gov/producti…surveydef.js?v=azbjrs2 could save 1KiB (31% reduction) after compression.
Minifying https://www.nasa.gov/sites/all/modules/fb_instant_…lay/js/admin.js?oo2668 could save 536B (56% reduction) after compression.
Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 6 blocking script resources and 8 blocking CSS resources. This causes a delay in rendering your page.
https://dap.digitalgov.gov/Universal-Federated-Ana…SA&yt=true&dclink=true
https://www.nasa.gov/sites/all/modules/fb_instant_…lay/js/admin.js?oo2668
https://www.nasa.gov/sites/all/modules/scald_twitt…cald_twitter.js?oo2668
https://www.nasa.gov/sites/all/themes/custom/nasatwo/js/vendor.js?oo2668
https://www.nasa.gov/sites/all/themes/custom/nasatwo/js/nasa.js?oo2668
https://www.nasa.gov/sites/all/modules/contributed…query.reject.js?oo2668
Optimize CSS Delivery of the following:
https://www.nasa.gov/sites/all/modules/custom/scal…after_image.css?oo2668
https://www.nasa.gov/sites/all/modules/custom/scal…htmlsnippet.css?oo2668
https://www.nasa.gov/sites/all/modules/custom/scal…cald_iframe.css?oo2668
https://www.nasa.gov/sites/all/modules/contributed…uery.reject.css?oo2668
https://www.nasa.gov/sites/all/modules/custom/nasa…d/card-feed.css?oo2668
https://www.nasa.gov/sites/all/themes/custom/nasatwo/css/vendor.css?oo2668
https://www.nasa.gov/sites/all/themes/custom/nasatwo/css/nasa.css?oo2668
https://fonts.googleapis.com/css?family=Titillium+Web:400,600,700
Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://www.nasa.gov/sites/all/themes/custom/nasatwo/images/camera90.svg (expiration not specified)
https://www.nasa.gov/sites/all/themes/custom/nasatwo/images/menu.png (expiration not specified)
https://www.nasa.gov/sites/all/themes/custom/nasatwo/images/nasa-logo.svg (expiration not specified)
https://www.nasa.gov/sites/all/themes/custom/nasatwo/images/ring.svg (expiration not specified)
https://www.nasa.gov/sites/all/themes/custom/nasatwo/images/search.svg (expiration not specified)
https://www.nasa.gov/sites/all/themes/custom/nasatwo/images/share.svg (expiration not specified)
https://www.nasa.gov/sites/all/themes/custom/nasat…s/starfield-banner.jpg (expiration not specified)
https://m.addthisedge.com/live/boost/addthisforshare/_ate.track.config_resp (60 seconds)
https://www.nasa.gov/api/1/query/latest (2 minutes)
https://www.nasa.gov/api/1/query/ubernodes.json?un…D=1&page=0&pageSize=24 (2 minutes)
https://www.nasa.gov/api/1/query/ytPlist/PLiuUQ9as…25&pagesize=24&index=0 (2 minutes)
https://www.nasa.gov/api/1/record/menu/main-menu.json (5 minutes)
https://www.nasa.gov/api/1/record/node/400428.json (5 minutes)
https://www.nasa.gov/api/1/record/node/400847.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401027.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401029.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401037.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401038.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401063.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401065.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401070.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401097.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401141.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401144.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401199.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401221.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401229.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401242.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401246.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401250.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401271.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401289.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401305.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401313.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401410.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401436.json (5 minutes)
https://www.nasa.gov/api/1/record/node/401447.json (5 minutes)
https://www.nasa.gov/api/1/record/terms/3165.json (5 minutes)
https://www.nasa.gov/api/1/record/terms/3187.json (5 minutes)
https://www.nasa.gov/api/1/record/terms/3631.json (5 minutes)
https://www.nasa.gov/api/1/record/terms/3642.json (5 minutes)
https://www.nasa.gov/api/1/record/terms/3691.json (5 minutes)
https://www.nasa.gov/api/1/record/terms/4528.json (5 minutes)
https://www.nasa.gov/api/1/record/terms/7628.json (5 minutes)
https://www.nasa.gov/api/1/record/terms/7782.json (5 minutes)
https://www.nasa.gov/sites/all/themes/custom/nasatwo/css/vendor.css?oo2668 (5 minutes)
https://www.nasa.gov/sites/default/files/styles/1x…0508.jpg?itok=5CUpelDG (5 minutes)
https://www.nasa.gov/sites/default/files/styles/1x…assa.gif?itok=xUqe8jf5 (5 minutes)
https://www.nasa.gov/sites/default/files/styles/1x…ts_0.jpg?itok=IU9ueC0q (5 minutes)
https://www.nasa.gov/sites/default/files/styles/1x…1041.jpg?itok=0c1L35G3 (5 minutes)
https://www.nasa.gov/sites/default/files/styles/1x…390.jpeg?itok=CDmOA77x (5 minutes)
https://www.nasa.gov/sites/default/files/styles/1x…1608.jpg?itok=J8UGMS8U (5 minutes)
https://www.nasa.gov/sites/default/files/styles/1x…me2a.gif?itok=AA67_Rvr (5 minutes)
https://www.nasa.gov/sites/default/files/styles/1x…tars.jpg?itok=Y9buVNxf (5 minutes)
https://www.nasa.gov/sites/all/modules/custom/scal…cald_iframe.css?oo2668 (6 minutes)
https://www.nasa.gov/sites/all/modules/scald_twitt…cald_twitter.js?oo2668 (6 minutes)
https://www.nasa.gov/sites/all/themes/custom/nasatwo/css/nasa.css?oo2668 (6 minutes)
https://www.nasa.gov/sites/all/themes/custom/nasatwo/js/nasa.js?oo2668 (6 minutes)
https://www.nasa.gov/sites/all/themes/custom/nasatwo/js/vendor.js?oo2668 (6 minutes)
https://s7.addthis.com/js/300/addthis_widget.js?_=1494277385182 (10 minutes)
https://platform.twitter.com/widgets.js?_=1494277385183 (30 minutes)
https://i.ytimg.com/vi/-6mwmZqA5AU/sddefault.jpg (2 hours)
https://www.google-analytics.com/analytics.js (2 hours)
https://gateway.answerscloud.com/nasa-gov/production/gateway.min.js (6.7 hours)
https://gateway.answerscloud.com/nasa-gov/producti…ee_dhtml.css?v=azbjrs2 (6.7 hours)
https://gateway.answerscloud.com/nasa-gov/producti…ontroller.js?v=azbjrs2 (6.7 hours)
https://gateway.answerscloud.com/nasa-gov/producti…surveydef.js?v=azbjrs2 (6.7 hours)
https://gateway.answerscloud.com/nasa-gov/producti…e_trigger.js?v=azbjrs2 (6.7 hours)
Optimize images

Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 111.3KiB (56% reduction).
Compressing https://www.nasa.gov/sites/default/files/styles/1x…ts_0.jpg?itok=IU9ueC0q could save 29.9KiB (56% reduction).
Compressing https://www.nasa.gov/sites/default/files/styles/1x…0508.jpg?itok=5CUpelDG could save 28.1KiB (53% reduction).
Compressing https://www.nasa.gov/sites/default/files/styles/1x…tars.jpg?itok=Y9buVNxf could save 25.8KiB (65% reduction).
Compressing https://www.nasa.gov/sites/default/files/styles/1x…1041.jpg?itok=0c1L35G3 could save 11.9KiB (68% reduction).
Compressing https://www.nasa.gov/sites/default/files/styles/1x…1041.jpg?itok=0c1L35G3 could save 11.9KiB (68% reduction).
Compressing https://www.nasa.gov/sites/default/files/styles/1x…390.jpeg?itok=CDmOA77x could save 2.9KiB (20% reduction).
Compressing https://www.nasa.gov/sites/all/themes/custom/nasat…s/starfield-banner.jpg could save 674B (20% reduction).
Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.
The entire HTML response was not sufficient to render the above-the-fold content. This usually indicates that additional resources, loaded after HTML parsing, were required to render above-the-fold content. Prioritize visible content that is needed for rendering above-the-fold by including it directly in the HTML response.
None of the final above-the-fold content could be rendered even with the full HTML response.

nasa.gov Mobile Resources


Total Resources94
Number of Hosts18
Static Resources73
JavaScript Resources58
CSS Resources9

nasa.gov Mobile Resource Breakdown