Sdo.gsfc.nasa.gov - SEO Checker

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Overview of the SEO Check
Meta information
74% 
Page quality
48% 
Page structure
68% 
Link structure
97% 
Server
29% 
External factors
100% 
SEO Score
Response time
2.77 s
File size
30.80 kB
Words
444
Media files
29
Number of links
62 internal / 16 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
SDO | Solar Dynamics Observatory
The length of the page title is perfect. (317 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
SDO is designed to help us understand the Sun's influence on Earth and Near-Earth space by studying the solar atmosphere on small scales of space and time and in many wavelengths simultaneously.
The meta description is too long: 1241 pixels from max. 1000 pixels. Optimize description
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://sdo.gsfc.nasa.gov/mission/publications.php
The specified canonical link points to a different page.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Language defined in HTTP-Equiv meta tag: en-us
Server location: United States of America
There are different language information within the page markup.
The following language is defined by HTML: en-us
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
This page is hosted on a subdomain. Use a top level domain for better SEO results.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
viewportwidth=device-width, initial-scale=1.0
verify-v1T8hRHhd64whPAjTyBXS+by5lsRX6JlZbov0Z0GC9Mfs=
doc-classLiving Document
orgcode671
rnoW. Dean Pesnell
content-ownerApexa Patel
authorApexa Patel
webmasterApexa Patel
descriptionSDO is designed to help us understand the Sun's influence on Earth and Near-Earth space by studying the solar atmosphere on small scales of space and time and in many wavelengths simultaneously.
langen
X-UA-CompatibleIE=edge
Content-Languageen-us
charsetutf-8

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Page quality

Content
(Critically important)
There are only 444 words on this page. Good pages should have about 800 words of useful content.
There are 2 text duplicates on this page:
  • Duplicate: But it has nothing to do with the Sun. The solstice is caused by the t...
26.4% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
The page contains a listing, which indicates a good text layout.
4 paragraphs were found on this page.
No placeholders texts or images were found.
The average number of words per sentence of 12.29 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
This page loads 8 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1.0" is provided.
Bold and strong tags
(Somewhat important)
Empty bold or strong tags were found on this page.
Image SEO
(Somewhat important)
29 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/assets/img/site/SDO_Logo_glassy_lg.pngNo alt attribute provided
/assets/img/latest/SDO_2D.jpgNo alt attribute provided
/assets/img/latest/latest_256_HMIB.jpgNo alt attribute provided
/assets/img/site/feed-icon16x16.pngNo alt attribute provided
/assets/img/site/feed-icon16x16.pngNo alt attribute provided
/assets/img/latest/latest_512_0193.jpgNo alt attribute provided
/assets/img/latest/latest_512_0171.jpgNo alt attribute provided
/assets/img/latest/latest_512_0304.jpgNo alt attribute provided
/assets/img/latest/latest_512_0211.jpgNo alt attribute provided
/assets/img/latest/latest_512_0131.jpgNo alt attribute provided
/assets/img/latest/latest_512_0335.jpgNo alt attribute provided
/assets/img/latest/latest_512_0094.jpgNo alt attribute provided
/assets/img/latest/latest_512_1600.jpgNo alt attribute provided
/assets/img/latest/latest_512_1700.jpgNo alt attribute provided
...ets/img/latest/latest_1024_211193171.jpgNo alt attribute provided
/assets/img/latest/f_304_211_171_512.jpgNo alt attribute provided
/assets/img/latest/f_094_335_193_512.jpgNo alt attribute provided
/assets/img/latest/f_HMImag_171_512.jpgNo alt attribute provided
/assets/img/latest/latest_512_HMIB.jpgNo alt attribute provided
/assets/img/latest/latest_512_HMII.jpgNo alt attribute provided
/assets/img/latest/latest_512_HMID.jpgNo alt attribute provided
...umbnails/Lunar_eclipse171cross_big_t.jpgNo alt attribute provided
/assets/img/latest/SDO_VO3.jpgNo alt attribute provided
/assets/img/site/hmi_logo_sm.pngNo alt attribute provided
/assets/img/site/aia_logo_sm.pngNo alt attribute provided
/assets/img/site/eve_logo_sm.pngNo alt attribute provided
/assets/img/site/blogger-logo_sm.pngNo alt attribute provided
/assets/img/site/twitter-logo_sm.pngNo alt attribute provided
/assets/img/site/nasa.pngNo alt attribute provided

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
Some headings occur twice on the page.
The structure of headings is missing one or more levels. Do not skip heading levels.
There are 28 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H2 SDO | Solar Dynamics Observatory
H3 SDO Mission Blog
H3 @TheSunToday
H3 Instrument Sites
H3 Social Media
H4 Celebrate Solstice 2024 with a Solar Fireworks Show! - Thu, 20 Jun
H4 AIA 0193
H4 AIA 0171
H4 AIA 0304
H4 AIA 0211
H4 AIA 0131
H4 AIA 0335
H4 AIA 094
H4 AIA 1600
H4 AIA 1700
H4 AIA 211, 193, 171
H4 AIA 304, 211, 171
H4 AIA 094, 335, 193
H4 AIA 171 & HMIB
H4 HMI Magnetogram
H4 HMI Intensitygram
H4 HMI Dopplergram
H4 Criss-Crossing Lunar Transit
H4 Celebrate Solstice 2024 with a Solar Fireworks Show! - Thu, 20 Jun Duplicate text
H4 Eclipse Day Transit was not as Exciting as the Total Solar Eclipse - Wed, 10 Apr
H4 Spring 2024 Calibration Maneuvers Begin Today - Wed, 10 Apr
H4 Momentum Management Maneuver (Delta-H) #49 today - Wed, 27 Mar
H4 09 April 2024 Lunar Transit (08 April for North America) - Mon, 05 Feb
There are 1 links with a trivial anchor text.
The number of internal links is ok.
Every linktext is unique.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are 16 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://sdo.gsfc.nasa.gov/Subdomain No Text
https://sdo.gsfc.nasa.gov/Home (current)
/mission/moc.phpWhere is SDO?
/mission/About SDO
/mission/spacecraft.phpSpacecraft Specs
/mission/instruments.phpInstruments
/mission/publications/Publications
/mission/science.phpScience
/mission/spaceweather.phpSDO & Space Weather
/mission/meetings.phpSDO Meetings
/mission/solarmeetings.phpSolar Meetings
/mission/talks.phpSDO Science Talks
/mission/project.phpProject
/mission/launch.phpSDO Launch
/mission/team.phpTeam
/mission/contact.phpContact
https://sdo.gsfc.nasa.gov/data/The Sun Now
/data/aiahmi/AIA/HMI Browse Data
/data/dailymov.phpDaily Movies
/data/dashboard/New window Browse Data Dashboard
http://lasp.colorado.edu/eve/d...New window External Subdomain EVE Data
/data/synoptic/Synoptic Maps
/data/channels.phpHMI & AIA Channels
/data/bestpractice.phpBest Practice
/data/dataaccess.phpWays to Access Data
/data/rules.phpData Rules
http://sdoisgo.blogspot.com/20...New window External Subdomain Celebrate Solstice 2024 with a Solar Fireworks Show! - Thu, 20 Jun But it has nothing to do with the Sun. The solstice is caused by the tilt of the Earth’s r...
http://sdoisgo.blogspot.com/New window External Subdomain Mission Blog - All
/resources/press.phpMedia Resources
/resources/feeds.phpSite Feeds
/resources/talks.phpTalks
/resources/reports.phpReports
/resources/links.phpLinks
/resources/acronyms.phpAcronyms
https://sdo.gsfc.nasa.gov/epo/Outreach Home
/epo/families/SDO for Families
/epo/educators/SDO for Educators
/epo/lovejoy.phpComet Lovejoy Event
/epo/venustransit/2012 Venus Transit
/mercurytransit/public/2016/Subdomain 2016 Mercury Transit Event
/mercurytransit/public/2019/Subdomain 2019 Mercury Transit Event
/gallery/mainSDO Gallery
/gallery/potw/latestPick of the Week
/gallery/firstlight/SDO First Light
/gallery/itl/Integration, Testing, & Launch
/gallery/ultrahd/Ultra HD
/gallery/animations/Animations & Features
https://svs.gsfc.nasa.gov/sear...New window External Subdomain Science Visualization Studio
/gallery/print/Printing Tips
/gallery/copyright/Copyright Permissions
/resources/feeds.phpAll RSS Feeds
/feeds/aia_0193.rssAIA 193
/feeds/aia_0171.rssAIA 171
/feeds/hmib.rssHMI Magnetogram
/feeds/dailymov_0171.rssAIA 0171
/feeds/dailymov_0193.rssAIA 0193
/feeds/dailymov_HMIIF.rssHMI Colorized Intensitygram - Flattened
/feeds/PFSS0171.rssPFSS 0171
/feeds/PFSS0193.rssPFSS 0193
https://sdo.gsfc.nasa.gov/Anchor Previous
https://sdo.gsfc.nasa.gov/Anchor Next
https://sdo.gsfc.nasa.gov/data/More images »
/gallery/potw/item/954Trivial anchor text
read more
/gallery/potw/More picks »
/gallery/main/Main Gallery »
/mission/moc.phpWhere is SDO? »
http://sdoisgo.blogspot.com/20...New window External Subdomain Text duplicate Celebrate Solstice 2024 with a Solar Fireworks Show! - Thu, 20 Jun But it has nothing to do with the Sun. The solstice is caused by the tilt of the Earth’s r...
http://sdoisgo.blogspot.com/20...New window External Subdomain Eclipse Day Transit was not as Exciting as the Total Solar Eclipse - Wed, 10 Apr The Moon covered about 5% of the solar disk at 09-Apr-2024, 03:36 UTC (08-Ap...
http://sdoisgo.blogspot.com/20...New window External Subdomain Spring 2024 Calibration Maneuvers Begin Today - Wed, 10 Apr ...
http://sdoisgo.blogspot.com/20...New window External Subdomain Momentum Management Maneuver (Delta-H) #49 today - Wed, 27 Mar ...
http://sdoisgo.blogspot.com/20...New window External Subdomain 09 April 2024 Lunar Transit (08 April for North America) - Mon, 05 Feb Here is a movie from the SDO Flight Dynamics Team showing the transit. The transit wil...
http://www.twitter.com/thesunt...External Subdomain View details »
http://hmi.stanford.edu/New window External Subdomain No Text
http://aia.lmsal.com/New window External Subdomain No Text
http://lasp.colorado.edu/home/...New window External Subdomain No Text
https://sdoisgo.blogspot.com/New window External Subdomain No Text
https://www.twitter.com/NASA_SDONew window External Subdomain No Text
https://www.nasa.gov/accessibi...New window External Subdomain Accessibility

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://sdo.gsfc.nasa.gov/"
HTTP header
(Important)
The HTML page should be transferred using GZip compression.
No X-Powered HTTP header is sent.
Performance
(Somewhat important)
The page response time is very slow (2.77 seconds). The response time should be less than 0.4 seconds. Slow websites are bad for search engine bots and also result in bad user experience.
This page loads 8 JavaScript files. This may affect the load time negatively.
This page only loads 2 CSS files. That's ok.
The file size of the HTML document is fine (31 kB).

HTTP Response Header

NameValue
dateFri, 04 Oct 2024 13:32:51 GMT
serverApache
x-frame-optionsSAMEORIGIN
strict-transport-securitymax-age=31536000; includeSubDomains;
transfer-encodingchunked
content-typetext/html; charset=UTF-8
statuscode200
http_versionHTTP/1.1

External factors

Blacklists
(Nice to have)
This website is not classified "for adult only".
This website has excellent links from other websites.
This page has backlinks from 3,469 referring domains.
This page has 1,194,460 backlinks.
This page has backlinks from 2,765 different ip addresses.
Facebook popularity
(Somewhat important)
The page has 0 shares and comments on Facebook.

Links from Wikipedia

No links from Wikipedia were found.

Robots.txt

Sitemap: https://sdo.gsfc.nasa.gov/sitemap.xml

User-agent: *
Disallow: /stats

Similar sites

Search preview

sdo.gsfc.nasa.gov
SDO | Solar Dynamics Observatory
SDO is designed to help us understand the Sun's influence on Earth and Near-Earth space by studying the solar atmosphere on small scales of space and time and in many wavelengths simultaneously.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
SDO79%Check
Solar66%Check
Solar Dynamics60%Check
Solar Dynamics Observatory57%Check
Solar Eclipse54%Check
Total Solar54%Check
Dynamics50%Check
Sun50%Check
Observatory50%Check
Total Solar Eclipse49%Check
Show more keywords and terms

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