4.3 sec in total
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Welcome to princetonastronomy.org homepage info - get ready to check Princeton Astronomy best content right away, or after learning these important things about princetonastronomy.org
Visit princetonastronomy.orgWe analyzed Princetonastronomy.org page load time and found that the first response time was 207 ms and then it took 4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
princetonastronomy.org performance score
name
value
score
weighting
Value2.3 s
75/100
10%
Value5.7 s
16/100
25%
Value3.6 s
86/100
10%
Value400 ms
68/100
30%
Value0.024
100/100
15%
Value4.2 s
85/100
10%
207 ms
78 ms
116 ms
196 ms
880 ms
Our browser made a total of 65 requests to load all elements on the main page. We found that 88% of them (57 requests) were addressed to the original Princetonastronomy.org, 3% (2 requests) were made to Staticxx.facebook.com and 2% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (2.4 sec) belongs to the original domain Princetonastronomy.org.
Page size can be reduced by 339.4 kB (5%)
6.3 MB
6.0 MB
In fact, the total size of Princetonastronomy.org main page is 6.3 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. 55% of websites need less resources to load. Images take 6.2 MB which makes up the majority of the site volume.
Potential reduce by 23.8 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. This page needs HTML code to be minified as it can gain 4.9 kB, which is 16% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 23.8 kB or 76% of the original size.
Potential reduce by 307.1 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. Princeton Astronomy images are well optimized though.
Potential reduce by 34 B
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.
Potential reduce by 8.4 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. Princetonastronomy.org needs all CSS files to be minified and compressed as it can save up to 8.4 kB or 83% of the original size.
We found no issues to fix!
61
61
The browser has sent 61 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Princeton Astronomy. According to our analytics all requests are already optimized.
princetonastronomy.org
207 ms
css
78 ms
style.css
116 ms
ga.js
196 ms
sdk.js
880 ms
widgets.js
171 ms
hn.gif
161 ms
Moon_VB.jpg
959 ms
Launch_kremer.jpg
1018 ms
M13_VB.jpg
949 ms
Communiversity.jpg
1250 ms
Dyson.jpg
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H-B_BW.jpg
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Jupiter_VB.jpg
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Mazlin.jpg
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Starquest.jpg
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Spergel.jpg
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Veil_VB.jpg
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SSS.jpg
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C14.jpg
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Audience.jpg
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Transit_2014.jpg
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Venus_Transit.jpg
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Brothers.jpg
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Observatory.jpg
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Gott.jpg
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Arecibo.jpg
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rosette.jpg
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shuttle.jpg
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iss2.jpg
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H-B_objective.jpg
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m42b.jpg
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algol1.jpg
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ngc3372.jpg
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t-about-over.gif
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t-tutors-over2.gif
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t-members-over.gif
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t-gallery-over.gif
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t-events-over.gif
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t-links-over.gif
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bg.jpg
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AAAPbanner978.jpg
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PictureLineup.jpg
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Comets.jpg
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labelg.jpg
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xd_arbiter.php
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James_L_Green.jpg
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outreach.jpg
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Sidereal.jpg
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sky_chart.gif
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t-sun.gif
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t-about.gif
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t-tutors.gif
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t-members.gif
716 ms
t-gallery.gif
664 ms
t-events.gif
1285 ms
t-links.gif
601 ms
princetonastronomy.org accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
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
<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
Image elements do not have [alt] attributes
Form elements do not have associated labels
Links do not have a discernible name
<object> elements do not have alternate text
princetonastronomy.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Browser errors were logged to the console
princetonastronomy.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
EN
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Princetonastronomy.org 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 Princetonastronomy.org 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.
princetonastronomy.org
Open Graph description is not detected on the main page of Princeton Astronomy. 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: