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Welcome to black-holes.org homepage info - get ready to check Black Holes best content for United States right away, or after learning these important things about black-holes.org
The SXS project is a collaborative research effort involving multiple institutions. Our goal is the simulation of black holes and other extreme spacetimes to gain a better understanding of Relativity,...
Visit black-holes.orgWe analyzed Black-holes.org page load time and found that the first response time was 187 ms and then it took 3.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.
black-holes.org performance score
name
value
score
weighting
Value8.5 s
0/100
10%
Value11.5 s
0/100
25%
Value11.5 s
5/100
10%
Value480 ms
60/100
30%
Value0.051
99/100
15%
Value10.8 s
22/100
10%
187 ms
783 ms
202 ms
204 ms
138 ms
Our browser made a total of 87 requests to load all elements on the main page. We found that 83% of them (72 requests) were addressed to the original Black-holes.org, 9% (8 requests) were made to Fonts.gstatic.com and 3% (3 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Black-holes.org.
Page size can be reduced by 1.4 MB (60%)
2.3 MB
917.2 kB
In fact, the total size of Black-holes.org main page is 2.3 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. 60% of websites need less resources to load. Javascripts take 1.4 MB which makes up the majority of the site volume.
Potential reduce by 61.5 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 18.7 kB, which is 25% 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 61.5 kB or 83% of the original size.
Potential reduce by 56.7 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. Obviously, Black Holes needs image optimization as it can save up to 56.7 kB 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 953.1 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 953.1 kB or 70% of the original size.
Potential reduce by 318.8 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. Black-holes.org needs all CSS files to be minified and compressed as it can save up to 318.8 kB or 84% of the original size.
Number of requests can be reduced by 35 (45%)
77
42
The browser has sent 77 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Black Holes. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 14 to 1 for CSS and as a result speed up the page load time.
black-holes.org
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www.black-holes.org
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black-holes.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.
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
Links do not have a discernible name
black-holes.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
black-holes.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
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Black-holes.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 Black-holes.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.
black-holes.org
Open Graph description is not detected on the main page of Black Holes. 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: