Tools & Wizards About Us
apod.nasa.gov screenshot

Report Summary

  • 86

    Performance

    Renders faster than
    89% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 84% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

apod.nasa.gov

Astronomy Picture of the Day

Page Load Speed

712 ms in total

First Response

248 ms

Resources Loaded

330 ms

Page Rendered

134 ms

apod.nasa.gov screenshot

About Website

Click here to check amazing Apod Nasa content for United States. Otherwise, check out these important facts you probably never knew about apod.nasa.gov

A different astronomy and space science related image is featured each day, along with a brief explanation.

Visit apod.nasa.gov

Key Findings

We analyzed Apod.nasa.gov page load time and found that the first response time was 248 ms and then it took 464 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster. This domain responded with an error, which can significantly jeopardize Apod.nasa.gov rating and web reputation

Performance Metrics

apod.nasa.gov performance score

86

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

79/100

10%

LCP (Largest Contentful Paint)

Value3.1 s

74/100

25%

SI (Speed Index)

Value2.2 s

99/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.185

66/100

15%

TTI (Time to Interactive)

Value3.1 s

95/100

10%

Network Requests Diagram

apod.nasa.gov

248 ms

astropix.html

10 ms

403

29 ms

CaesarCoin_Wikipedia_960.jpg

17 ms

Our browser made a total of 4 requests to load all elements on the main page. We found that 75% of them (3 requests) were addressed to the original Apod.nasa.gov, 25% (1 request) were made to Dap.digitalgov.gov. The less responsive or slowest element that took the longest time to load (248 ms) belongs to the original domain Apod.nasa.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.9 kB (3%)

Content Size

103.8 kB

After Optimization

100.9 kB

  • HTML
  • Images

In fact, the total size of Apod.nasa.gov main page is 103.8 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Images take 98.8 kB which makes up the majority of the site volume.

HTML Optimization

-56%

Potential reduce by 2.8 kB

  • Original 4.9 kB
  • After minification 4.8 kB
  • After compression 2.1 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 2.8 kB or 56% of the original size.

Image Optimization

-0%

Potential reduce by 94 B

  • Original 98.8 kB
  • After minification 98.8 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. Apod Nasa images are well optimized though.

Requests Breakdown

We found no issues to fix!

Requests Now

1

After Optimization

1

  • Images

The browser has sent 1 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Apod Nasa. According to our analytics all requests are already optimized.

Network Requests Diagram

apod.nasa.gov

apod.nasa.gov

248 ms

astropix.html

astropix.html

10 ms

403

403

29 ms

CaesarCoin_Wikipedia_960.jpg

CaesarCoin_Wikipedia_960.jpg

17 ms

Accessibility Review

apod.nasa.gov accessibility score

94

Accessibility Issues

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

Best Practices

apod.nasa.gov best practices score

92

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

Page has valid source maps

SEO Factors

apod.nasa.gov SEO score

100

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Apod.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 Apod.nasa.gov main page’s claimed encoding is iso-8859-1. 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

apod.nasa.gov

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