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Home
https://stsci.edu
The Space Telescope Science Institute helps humanity explore the universe with advanced space telescopes and ever-growing data archives.
https://stsci.edu
Home
The Space Telescope Science Institute helps humanity explore the universe with advanced space telescopes and ever-growing data arc...
No 301 redirects are in place to redirect traffic to your preferred domain. Pages that load successfully both with and without www. are treated as duplicate content! Not all versions of your page point to the same URL.
| Attribute | Value |
| ⓘ viewport | width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=2, user-scalable=yes |
ⓘ The results of our semantic analysis are shown below using the website's language.
They are the main concepts covered by stsci.edu.
Each concept has a confidence score. The higher it is, the more important the topic is relative to the page.
| Topics | |
Space Telescope Science Institute Confidence: 89% 
|
|
Universe Confidence: 71%
|
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Space telescope Confidence: 64% 
|
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Human Confidence: 63%
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ⓘ This website is ranked #216.339 by Alexa.
This rank is traffic based. The lower the rank is, the better the domain is ranked.
| Country | Rank |
 United States of America |
#94.568 |
 India |
#109.298 |
Mobile Rendering
This website seems to be optimized for Mobile Visitors.
Phone
Tablet
A good text to HTML ratio is anywhere from 25 to 70%.
This percentage refers to the visible text ratio, as opposed to HTML elements, image tags and other non-visible information.
Great, we found headings on this page.
However, you have not defined a top level heading, or <H1>. It is used to define the most important heading.
We recommend using one top level heading to set up a semantic relationship between that heading and the remainder of the content on a page. It clearly describes to the readers and the search engines what it is about.
| 2nd level heading |
| Space telescope science ınstitute |
| Main navigation |
| Breadcrumbs navigation |
| Hero section |
| Masthead banner |
| Mission ad boxes |
| Recent news |
| ınstıtute announcements |
| Press releases |
| Events |
| About the ınstıtute |
| Footer stscı secondary navigation |
| Social media |
| Utility navigation |
| 3rd level heading |
| ıntroducing the ullyses program |
| Newsletters: 2019, volume 36, ıssue 03 released |
We found 47 images on this website.
20
ALT attributes are missing on your image tags. The issue affects 11 actual different images that could be loaded more than once in your page.
Alternative text allows you to add a description to an image.
Google rely on alternative text attributes to determine relevance to a search query. Alternative text also makes an image more likely to appear in a Google image search.
It looks like you're missing alternative text for 20 images on stsci.edu. Check your website to make sure it's specified for each image on the page.
For a better readability, only the first 50 internal links are shown below.
| ⓘ Registration Date | 06/12/1987 36 years, 11 months, 14 days ago |
| ⓘ Last Modified | 09/26/2019 4 years, 7 months, 28 days ago |
| ⓘ Expiration Date | 07/31/2020 Expired |
Others (48.6%)
SOCIAL MEDIA PRESENCE
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