881 ms in total
112 ms
532 ms
237 ms
Click here to check amazing Black Holes Star Date content for United States. Otherwise, check out these important facts you probably never knew about blackholes.stardate.org
A solid overview of black holes and details on the best-known individual black holes for the general public. StarDate's Black Holes Encyclopedia is an extension of the research and public outreach eff...
Visit blackholes.stardate.orgWe analyzed Blackholes.stardate.org page load time and found that the first response time was 112 ms and then it took 769 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.
blackholes.stardate.org performance score
name
value
score
weighting
Value1.4 s
97/100
10%
Value3.0 s
78/100
25%
Value1.4 s
100/100
10%
Value50 ms
100/100
30%
Value0.252
49/100
15%
Value1.6 s
100/100
10%
112 ms
48 ms
106 ms
8 ms
46 ms
Our browser made a total of 23 requests to load all elements on the main page. We found that 91% of them (21 requests) were addressed to the original Blackholes.stardate.org, 9% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (228 ms) belongs to the original domain Blackholes.stardate.org.
Page size can be reduced by 51.5 kB (14%)
364.9 kB
313.4 kB
In fact, the total size of Blackholes.stardate.org main page is 364.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Images take 300.2 kB which makes up the majority of the site volume.
Potential reduce by 6.9 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 6.9 kB or 64% of the original size.
Potential reduce by 14.0 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. Black Holes Star Date images are well optimized though.
Potential reduce by 17.7 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 17.7 kB or 46% of the original size.
Potential reduce by 12.9 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. Blackholes.stardate.org needs all CSS files to be minified and compressed as it can save up to 12.9 kB or 86% of the original size.
We found no issues to fix!
21
21
The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Black Holes Star Date. According to our analytics all requests are already optimized.
blackholes.stardate.org
112 ms
bh-styles.css
48 ms
swfobject_modified.js
106 ms
ga.js
8 ms
body_background.jpg
46 ms
sd_logo.jpg
45 ms
header_bg.jpg
92 ms
header.jpg
115 ms
spacer.gif
86 ms
print-logo.gif
74 ms
home_image.jpg
121 ms
homebox_bg.jpg
97 ms
newest_object_tab.jpg
120 ms
0192_xray_opt_comp.jpg
228 ms
more_tab.jpg
136 ms
stranger-than-fiction-still.jpg
145 ms
research_tab.jpg
162 ms
2011orbits_still_150px.jpg
163 ms
McDO_Logo_Small_E_RGB.png
163 ms
nasa_logo.png
182 ms
nsf_logo.png
186 ms
__utm.gif
11 ms
KG_footer-over.jpg
80 ms
blackholes.stardate.org 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
Image elements do not have [alt] attributes
blackholes.stardate.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
blackholes.stardate.org 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
Image elements do not have [alt] attributes
EN
EN
MACINTOSH
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Blackholes.stardate.org 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 Blackholes.stardate.org main page’s claimed encoding is macintosh. 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.
blackholes.stardate.org
Open Graph description is not detected on the main page of Black Holes Star Date. 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: