Science.nasa.gov - SEO Checker

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Overview of the SEO Check
Meta information
84% 
Page quality
93% 
Page structure
63% 
Link structure
13% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.06 s
File size
299.40 kB
Words
893
Media files
30
Number of links
45 internal / 34 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
NASA Science
The page title is too short. (130 pixels of 580 max pixel length) Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
NASA Science seeks to discover the secrets of space, the origins of the universe, search for life elsewhere, and protect and improve life on Earth.
The length of the meta description is perfect. (894 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://science.nasa.gov/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en-us
Server location: United States of America
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
descriptionNASA Science seeks to discover the secrets of space, the origins of the universe, search for life elsewhere, and protect and improve life on Earth.
robotsfollow, index, max-snippet:-1, max-video-preview:-1, max-image-preview:large
application-nameNASA
msapplication-TileColor#da532c
theme-color#ffffff
msapplication-TileImagehttps://science.nasa.gov/wp-content/plugins/nasa-hds-core-setup/assets/favicons/mstile-144x144.png
msapplication-confighttps://science.nasa.gov/wp-content/plugins/nasa-hds-core-setup/assets/favicons/browserconfig.xml
msapplication-square70x70logohttps://science.nasa.gov/wp-content/plugins/nasa-hds-core-setup/assets/favicons/mstile-70x70.png
msapplication-square150x150logohttps://science.nasa.gov/wp-content/plugins/nasa-hds-core-setup/assets/favicons/mstile-150x150.png
msapplication-wide310x150logohttps://science.nasa.gov/wp-content/plugins/nasa-hds-core-setup/assets/favicons/mstile-310x150.png
msapplication-square310x310logohttps://science.nasa.gov/wp-content/plugins/nasa-hds-core-setup/assets/favicons/mstile-310x310.png
generatorWordPress 6.7.2
searchgov_custom11::176
searchgov_custom2Empty
searchgov_custom3page
keywordsScience Mission Directorate
google-site-verificationFPf3JviUYpAZPGOV51pOmZC43TaCwVffwZYQyzLfK-M
article:published_time2023-03-07T13:59:14-05:00
article:modified_time2025-05-16T09:59:18-04:00
video:duration168
ya:ovs:upload_date2025-05-12T05:55:33-07:00
ya:ovs:allow_embedtrue
langen-us
twitter:cardsummary_large_image
twitter:titleNASA Science
twitter:descriptionNASA Science seeks to discover the secrets of space, the origins of the universe, search for life elsewhere, and protect and improve life on Earth.
twitter:site@NASA
twitter:creator@NASA
twitter:imagehttps://assets.science.nasa.gov/dynamicimage/assets/science/missions/voyager/images/1-PIA26353-1-voyager%20spacecraft%20speeding%20through%20space%20(illustration).png
twitter:label1Written by
twitter:data1Michelle Belleville
twitter:label2Time to read
twitter:data2Less than a minute
og:localeen_US
og:typewebsite
og:titleNASA Science
og:descriptionNASA Science seeks to discover the secrets of space, the origins of the universe, search for life elsewhere, and protect and improve life on Earth.
og:urlhttps://science.nasa.gov/
og:site_nameNASA Science
og:updated_time2025-05-16T09:59:18-04:00
og:imagehttps://assets.science.nasa.gov/dynamicimage/assets/science/missions/voyager/images/1-PIA26353-1-voyager%20spacecraft%20speeding%20through%20space%20(illustration).png
og:image:secure_urlhttps://assets.science.nasa.gov/dynamicimage/assets/science/missions/voyager/images/1-PIA26353-1-voyager%20spacecraft%20speeding%20through%20space%20(illustration).png
og:image:width1920
og:image:height1080
og:image:altArtist concept of the Voyager spacecraft in space with purple and blue background
og:image:typeimage/png
og:videohttps://www.youtube.com/embed/U2T8LpD4IiI
charsetUTF-8

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Page quality

Content
(Critically important)
This page contains 893 words. That's ok.
33.7% of the text are stop words.
The page contains a listing, which indicates a good text layout.
16 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 20.2 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, initial-scale=1" is provided.
At least one Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 18 tags for this page.
Image SEO
(Somewhat important)
13 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
This page is optimized perfectly for social networks.
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
...asa-child/assets/images/[email protected]NASA Logo
...asa-child/assets/images/[email protected]NASA Logo
...20&h=1080&fit=clip&crop=faces,focalpointArtist concept of the Voyager spacecraft in space with purple and blue background
...440&h=945&fit=clip&crop=faces,focalpointIllustration of a spacecraft at an asteroid.
...20&h=1143&fit=clip&crop=faces,focalpointNASA's NEO Surveyor is seen in this illustration against an infrared observation of a starfield made by the agency's WISE mission.
...024&h=576&fit=clip&crop=faces,focalpointA digital rendering shows the instruments and associated equipment that will be included on board the PACE spacecraft.
...578&h=776&fit=clip&crop=faces,focalpointNo alt attribute provided
...21&h=3896&fit=clip&crop=faces,focalpointNo alt attribute provided
...82&h=1634&fit=clip&crop=faces,focalpointNo alt attribute provided
...20&h=2262&fit=clip&crop=faces,focalpointNo alt attribute provided
...03&h=3775&fit=clip&crop=faces,focalpointNo alt attribute provided
...&fit=clip&crop=faces,focalpoint?w=2048pxNo alt attribute provided
...36&h=1653&fit=clip&crop=faces,focalpointPhoto of Nicky Fox talking at a podium
...03&h=2016&fit=clip&crop=faces,focalpointA concentration of bright blue stars occupies the bottom right corner of the image. At bottom center within them is a small blue bubble. The stars and bubble are part of a diffuse dwarf galaxy that extends beyond the image border. Background galaxies are scattered across the image, with some particularly prominent spirals located at upper left and upper right. The background of space is black.
...399&h=250&fit=clip&crop=faces,focalpointImage of deep space showing a dense field of distant galaxies, stars, and cosmic structures captured by the James Webb Space Telescope.
...400&h=302&fit=clip&crop=faces,focalpointDiagram showing outgassing from Centaur 29P with labeled jets of carbon monoxide (CO) and carbon dioxide (CO₂) observed by the James Webb Space Telescope. Includes spectral maps of CO and CO₂ abundance and a side view illustrating jet directions.
...024&h=576&fit=clip&crop=faces,focalpointNancy Grace Roman Telescope against a purple galaxy
...280&h=853&fit=clip&crop=faces,focalpointAn M dwarf star is seen with three exoplanets.
...800&h=600&fit=clip&crop=faces,focalpointAnimated GIF of Spacecraft Over Earth
...eNumbers-1-jpg-e1689964440266.webp?w=768A complex info graphic with text, numbers, icons on a dark blue background laid out in a circular design
...00&h=1875&fit=clip&crop=faces,focalpointIllustration for the 2025 NASA Science SMD Community Town Hall, featuring a vibrant cosmic scene. The artwork includes a swirling galaxy, planets, and stars in the background, with satellites orbiting in space. The foreground depicts Earth's landscape, including a research vessel on an ocean, a deep-sea submersible, and a mountain observatory under a glowing sky. NASA and SMD logos are displayed at the top, and the title is prominently written in white text.
...-strategic-plan-cover-graphic.png?w=1024No alt attribute provided
...t/uploads/2023/07/oc-office-2.jpg?w=1024No alt attribute provided
...uploads/2023/07/hull-thruster.jpg?w=1024No alt attribute provided
...2023/04/hubble_faq_image-jpg.webp?w=1512No alt attribute provided
...h44ay5ztcv1npb227b2p650j-temp.png?w=1536No alt attribute provided
...06/36573084511-51d35bcdff-k-1.jpg?w=1536No alt attribute provided
.../uploads/2007/08/hibah-rahmani.jpg?w=622No alt attribute provided
...asa-child/assets/images/[email protected]NASA Logo
Video URLWidthHeight
...ube.com/embed/U2T8LpD4IiI?feature=oembed200113

Page structure

H1 heading
(Critically important)
NASA Science
Too many H1 headings
The H1 heading is too short (12 characters). It should be at least 20 Characters long.
Headings
(Important)
There are 26 headings on the page. The amount of headings should be in a more proper relation to the amount of text.

Heading structure

Heading levelContent
H1 NASA Science
H1 Hubble Captures Cotton Candy Clouds
H2 Suggested Searches
H2 Featured Missions
H2 Latest News
H2 Nicky Notes
H2 Astrophysics
H2 How we Look at Earth
H2 Explore our changing planet
H2 By the Numbers
H2 Dive Deeper
H2 More about NASA Science
H3 Lucy
H3 NEO Surveyor
H3 PACE
H3 Spectacular light show on Jupiter
H3 Welcome to the universe
H3 Astrophysics Data
H3 The Future of Exploration
H3 Are We Alone?
H3 SMD Community Town Hall Meetings
H3 NASA Science Strategy
H3 People of NASA Science
H3 NASA Science Careers
H3 National Aeronautics and Space Administration
H3 Follow NASA
Some internal link anchor texts are too long.
Some internal links have dynamic parameters. All internal URLs, which are not marked as nofollow, should not contain dynamic parameters.
Some anchor texts are used more than once.
The number of internal links is ok.
There are too many external links (34) on this page.

Found links on this page

LinkAttributesAnchor text
https://www.nasa.gov/External Subdomain IMG-ALT NASA Logo
https://www.nasa.gov/External Subdomain Text duplicate IMG-ALT NASA Logo
https://plus.nasa.gov/External Subdomain NASA+
/?search=Climate ChangeSubdomain Climate Change
/?search=ArtemisSubdomain Artemis
/?search=Expedition 64Subdomain Expedition 64
/?search=Mars perseveranceSubdomain Mars perseverance
/?search=SpaceX Crew-2Subdomain SpaceX Crew-2
/?search=International Space S...Subdomain International Space Station
/a-to-z-topics-listing/Subdomain View All Topics A-Z
/science-missions/Subdomain Science Missions
/mission/voyager/where-are-voy...Subdomain Where are Voyager 1 and 2?
/blogs/voyager/?utm_source=sci...Subdomain Voyager’s Journey Continues
https://eyes.nasa.gov/apps/sol...External Subdomain Anchor Near Real-time Visualization
/science-missions/?utm_source=...Subdomain All Science Missions
/mission/lucy/?utm_source=scie...Subdomain More about Lucy
/mission/neo-surveyor/?utm_sou...Subdomain More about NEO Surveyor
/mission/pace/?utm_source=scie...Subdomain More about PACE
/science-news/?utm_source=scie...Subdomain More Science News
/get-involved/citizen-science/...Subdomain Article 2 Min Read Space Cloud Watch Needs Your Photos of Night-Shining Clouds
/missions/hubble/hubble-pinpoi...Subdomain Article 2 Min Read Hubble Pinpoints Young Stars in Spiral Galaxy
/missions/webb/webbs-titan-for...Subdomain 7 Min Read Webb’s Titan Forecast: Partly Cloudy With Occasional Methane Showers Article
/missions/webb/nasas-webb-reve...Subdomain 5 Min Read NASA’s Webb Reveals New Details, Mysteries in Jupiter’s Aurora Article
/missions/hubble/hubble-comes-...Subdomain 2 Min Read Hubble Comes Face-to-Face with Spiral’s Arms Article
/missions/webb/nasas-webb-reve...Subdomain More about the Mysteries in Jupiter’s Auroras
/missions/hubble/hubble-captur...Subdomain Read the Story
/directorates/smd/nasa-science...Subdomain Continue reading Nicky Notes…
/astrophysics/?utm_source=scie...Subdomain Dive into the Universe about Astrophysics
/universe/?utm_source=science&...Subdomain IMG-ALT Image of deep space showing a dense field of distant galaxies, stars, and cosmic structures captured by the James Webb Space Telescope.
/universe/?utm_source=science&...Subdomain Welcome to the universe
/astrophysics/data/?utm_source...Subdomain IMG-ALT Diagram showing outgassing from Centaur 29P with labeled jets of carbon monoxide (CO) and carbon dioxide (CO₂) observed by the James Webb Space Telescope. In...
/astrophysics/data/?utm_source...Subdomain Astrophysics Data
/mission/roman-space-telescope...Subdomain IMG-ALT Nancy Grace Roman Telescope against a purple galaxy
/mission/roman-space-telescope...Subdomain The Future of Exploration
/exoplanets/?utm_source=scienc...Subdomain IMG-ALT An M dwarf star is seen with three exoplanets.
/exoplanets/?utm_source=scienc...Subdomain Are We Alone?
https://earth.gov/External Visit the Earth Information Center
/about-us/?utm_source=science&...Subdomain Learn More about Science by the Numbers
/researchers/virtual-townhall/...Subdomain Town Hall Meetings
/about-us/science-strategy/?ut...Subdomain Science Strategy
/science-people/?utm_source=sc...Subdomain People of Science
/about-us/job-opportunities/?u...Subdomain Science Careers
/science-missions/Subdomain Text duplicate Science Missions
/science-news/Subdomain Latest NASA Science News
/for-everyone/Subdomain Science for Everyone
/researchers/Subdomain For Researchers
https://www.nasa.gov/about/External Subdomain About NASA's Mission
https://www.nasa.gov/get-invol...External Subdomain Join Us
https://www.nasa.gov/External Subdomain Home
https://www.nasa.gov/news/External Subdomain News & Events
https://www.nasa.gov/multimedia/External Subdomain Multimedia
https://plus.nasa.gov/External Subdomain Text duplicate NASA+
https://www.nasa.gov/nasa-miss...External Subdomain Missions
https://www.nasa.gov/humans-in...External Subdomain Humans in Space
https://science.nasa.gov/earth/Subdomain Earth
/solar-system/Subdomain The Solar System
/universe/Subdomain The Universe
https://science.nasa.gov/Subdomain Science
https://www.nasa.gov/aeronautics/External Subdomain Aeronautics
https://www.nasa.gov/technology/External Subdomain Technology
https://www.nasa.gov/learning-...External Subdomain Learning Resources
https://www.nasa.gov/about/External Subdomain About NASA
https://www.nasa.gov/es/New window External Subdomain NASA en Español
https://www.facebook.com/NASANew window External Subdomain A-TITLE NASA on Facebook
https://www.instagram.com/nasa/New window External Subdomain A-TITLE NASA on Instagram
https://x.com/NASANew window External A-TITLE NASA on X
https://www.youtube.com/@NASANew window External Subdomain A-TITLE NASA on YouTube
https://www.nasa.gov/social-me...External Subdomain More NASA Social Accounts
https://www.nasa.gov/nasa-news...External Subdomain NASA Newsletters
https://www.nasa.gov/sitemap/External Subdomain Sitemap
https://www.nasa.gov/news/nasa...External Subdomain For Media
https://www.nasa.gov/nasa-web-...External Subdomain Privacy Policy
https://www.nasa.gov/foia/External Subdomain FOIA
https://www.nasa.gov/no-fear-act/External Subdomain No FEAR Act
http://oig.nasa.gov/New window External Subdomain Office of the IG
https://www.nasa.gov/budgets-p...External Subdomain Budget & Annual Reports
https://www.nasa.gov/organizat...External Subdomain Agency Financial Reports
https://www.nasa.gov/contact-n...External Subdomain Contact NASA
https://www.nasa.gov/accessibi...External Subdomain Accessibility

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://science.nasa.gov/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is excellent with 0.06 seconds.
The file size of the HTML document is fine (299 kB).

HTTP Response Header

NameValue
servernginx
dateMon, 19 May 2025 02:02:17 GMT
content-typetext/html; charset=UTF-8
varyAccept-Encoding
host-headera9130478a60e5f9135f765b23f26593b
x-launch-statusGo Flight!
x-frame-optionsSAMEORIGIN
link<https://science.nasa.gov/>; rel=shortlink
content-encodingbr
x-rqvie2 0 20 9980
accept-rangesbytes
cache-controlmax-age=300, must-revalidate
x-cacheHIT
strict-transport-securitymax-age=31536000
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 960 referring domains.
This page has 84,231 backlinks.
This page has backlinks from 811 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

User-agent: usasearch
Crawl-delay: 1
Allow: /

User-agent: *
Allow: /Sitemap: https://science.nasa.gov/sitemap_index.xml

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science.nasa.gov
NASA Science
NASA Science seeks to discover the secrets of space, the origins of the universe, search for life elsewhere, and protect and improve life on Earth.

Most important keywords

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

KeywordResultRecheck
Science93%Check
NASA93%Check
NASA Science93%Check
NASA Science seeks80%Check
Science Missions68%Check
Science News67%Check
Science Strategy67%Check
Science Careers67%Check
PACE58%Check
universe56%Check
Show more keywords and terms

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