Planetary.org - SEO Checker

Overview of the SEO Check
Meta information
99% 
Page quality
89% 
Page structure
83% 
Link structure
25% 
Server
97% 
External factors
100% 
SEO Score
Response time
0.46 s
File size
81.30 kB
Words
685
Media files
18
Number of links
122 internal / 24 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
The Planetary Society
The page title is too short. (198 pixels of 580 max pixel length) Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
The Planetary Society is the largest and most effective nonprofit organization that promotes the exploration of space through education, advocacy, and...
The length of the meta description is perfect. (934 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://www.planetary.org/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: Canada
The following language is defined by HTML: en
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)
The domain is no subdomain.
The domain length is good.
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 character encoding is not specified in the HTTP header.
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,minimum-scale=1
apple-mobile-web-app-capableyes
apple-mobile-web-app-status-bar-styleblack-translucent
msapplication-TileColor#FFFFFF
msapplication-TileImage/img/site/mstile-144x144.png
msapplication-config/img/site/browserconfig.xml
descriptionThe Planetary Society is the largest and most effective nonprofit organization that promotes the exploration of space through education, advocacy, and...
referrerno-referrer-when-downgrade
robotsall
langen
twitter:cardsummary_large_image
twitter:site@exploreplanets
twitter:creator@exploreplanets
twitter:titleThe Planetary Society
twitter:descriptionThe Planetary Society is the largest and most effective nonprofit organization that promotes the exploration of space through education, advocacy, and...
twitter:imagehttps://planetary.s3.amazonaws.com/web/assets/pictures/_800x418_crop_center-center_82_none/TPS-logo.png?mtime=1753477397
twitter:image:width800
twitter:image:height418
twitter:image:altThe Planetary Society logo
fb:profile_id51189044844
og:localeen_US
og:site_nameThe Planetary Society
og:typewebsite
og:urlhttps://www.planetary.org/
og:titleThe Planetary Society
og:descriptionThe Planetary Society is the largest and most effective nonprofit organization that promotes the exploration of space through education, advocacy, and...
og:imagehttps://planetary.s3.amazonaws.com/web/assets/pictures/_1200x630_crop_center-center_82_none/TPS-logo.png?mtime=1753477397
og:image:width1200
og:image:height630
og:image:altThe Planetary Society logo
og:see_alsohttps://twitter.com/exploreplanets
charsetutf-8

Automatically check planetary.org including all subpages at once!

Try for free
Guaranteed free of charge during trial period.

Page quality

Content
(Critically important)
Words from the H1 heading are not used in the page content.
This page contains 685 words. That's ok.
26.9% of the text are stop words.
The page contains a listing, which indicates a good text layout.
7 paragraphs were found on this page.
No placeholders texts or images were found.
There are no duplicates on the site.
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)
A viewport "width=device-width,minimum-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 14 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
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.

Page structure

H1 heading
(Critically important)
NASA SCIENCE IS UNDER ATTACK
The H1 heading is perfect.
Headings
(Important)
There are 33 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 IS UNDER ATTACK
H2 Featured Stories
H2 Find your place in space
H2 Featured Fundraising Campaign
H2 Space Policy & Advocacy
H3 What We Do
H3 How We Work
H3 Our Results
H3 Space Topics
H3 Learn
H3 The Planetary Report
H3 Get Involved
H3 Support Our Mission
H3 The Planetary Fund
H3 About Us
H3 The Planetary Society
H3 Membership
H3 Register for the Save NASA Science Day of Action
H3 Supporting asteroid defense: The 2025 Shoemaker NEO Grant winners
H3 Save NASA Science - Action Hub
H3 When space rocks get too close for comfort
H3 What’s up in the night sky: August 2025
H3 3I/ATLAS: The third interstellar object ever found
H3 Explore Worlds
H3 Find Life
H3 Defend Earth
H3 Earth's first line of defense
H3 Where we stand on the issues
H3 Become A Member
H3 Get More Space
H4 Solar Maximum
H4 Our Vision
H4 Our Mission
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.
8 links don't have an anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
There are 24 external links on this page.
LinkAttributesAnchor text
https://www.planetary.org/Anchor Skip to main content
https://community.planetary.org/External Subdomain Community
/accountcenterAccount
/renew-membershipRenew
https://www.planetary.org/IMG-ALT Planetary Society logo
https://www.planetary.org/Text duplicate IMG-ALT Planetary Society logo
/accountcenterNo Text
https://www.planetary.org/donateDonate
/membershipJoin
/membershipBecome A Member
/renew-membershipText duplicate Renew
/gift-membershipGift Membership
/planetary-academyKids Membership
https://www.planetary.org/givingOther Ways to Give
https://www.planetary.org/donateText duplicate Donate
/membershipText duplicate Join
https://www.planetary.org/donateText duplicate Donate
/explore-worldsExplore Worlds
IMG-ALT hand reaching toward planet
/find-lifeFind Life
IMG-ALT hand pointing to dna
/defend-earthDefend Earth
IMG-ALT fist blocking meteor
/outreachEducation & Public Outreach
/space-policy-advocacySpace Policy & Advocacy
/sci-techScience & Technology
https://www.planetary.org/globalGlobal Collaboration
/about/our-impactOur Impact Learn how our members and community are changing the worlds.
/sci-tech/lightsailLightSail Our citizen-funded spacecraft successfully demonstrated solar sailing for CubeSats.
https://www.planetary.org/worldsPlanets & Other Worlds
/space-missionsSpace Missions
/night-skyNight Sky
/space-policySpace Policy
https://www.planetary.org/kidsFor Kids
/articlesArticles
/planetary-radioPlanetary Radio
/space-imagesSpace Images
https://www.planetary.org/videoVideos
https://www.planetary.org/coursesCourses
/planetary-reportSolar Maximum Our dynamic star's reach throughout the Solar System.
IMG-ALT robotic eel on snow
/membershipBecome A Member Membership programs for explorers of all ages.
https://www.planetary.org/connectEmail Signup Get updates and weekly tools to learn, share, and advocate for space exploration.
/action-centerAction Center Volunteer as a space advocate.
/renew-membershipRenew Membership
https://www.planetary.org/donateSociety Projects
https://www.planetary.org/travelTravel
https://www.planetary.org/givingText duplicate Other Ways to Give
https://www.planetary.org/shopStore
https://connect.planetary.org/...External Subdomain Give Today
https://www.planetary.org/aboutOverview
/about/strategic-frameworkStrategic Framework
/press-roomNews & Press
https://www.planetary.org/careersCareers
/about/contactContact Us
/about/our-storyOur Story
/membershipText duplicate Become A Member
/renew-membershipText duplicate Renew Membership
/gift-membershipText duplicate Gift Membership
/planetary-academyText duplicate Kids Membership
https://www.planetary.org/givingText duplicate Other Ways to Give
/about/contactText duplicate Contact Us
https://community.planetary.org/External Subdomain Member Community
/accountcenterAccount Center
https://www.facebook.com/plane...External Subdomain No Text
https://twitter.com/explorepla...External No Text
https://www.youtube.com/user/p...External Subdomain No Text
https://www.linkedin.com/compa...External Subdomain No Text
https://www.instagram.com/plan...External Subdomain No Text
https://www.facebook.com/plane...External Subdomain No Text
https://twitter.com/explorepla...External No Text
https://www.youtube.com/user/p...External Subdomain No Text
https://www.linkedin.com/compa...External Subdomain No Text
https://www.instagram.com/plan...External Subdomain No Text
/membership?s_src=homepageBecome A Member Today
/membership?s_src=homepagebarText duplicate Become A Member
https://connect.planetary.org/...External Subdomain Text duplicate Defend Earth
/action-centerTake Action
/advocacy/day-of-actionNo Text
/advocacy/day-of-actionDay of Action
/advocacy/day-of-actionRegister for the Save NASA Science Day of Action
/articles/2025-shoemaker-neo-g...No Text
/defend-earthText duplicate Defend Earth
/articles/2025-shoemaker-neo-g...Supporting asteroid defense: The 2025 Shoemaker NEO Grant winners
/save-nasa-scienceNo Text
/space-policy-advocacyText duplicate Space Policy & Advocacy
/save-nasa-scienceSave NASA Science - Action Hub
/articles/when-space-rocks-get...No Text
/defend-earthText duplicate Defend Earth
/articles/when-space-rocks-get...When space rocks get too close for comfort
/night-sky/night-sky-what-to-s...No Text
/night-sky/Text duplicate Night Sky
/night-sky/night-sky-what-to-s...What’s up in the night sky: August 2025
/planetary-radio/2025-3i-atlasNo Text
/planetary-radioText duplicate Planetary Radio
/planetary-radio/2025-3i-atlas3I/ATLAS: The third interstellar object ever found
/articlesMore Articles
/explore-worldsIMG-ALT hand reaching toward planet
/explore-worldsText duplicate Explore Worlds
/find-lifeIMG-ALT hand pointing to dna
/find-lifeText duplicate Find Life
/defend-earthIMG-ALT fist blocking meteor
/defend-earthText duplicate Defend Earth
/membership?level=Explorer&s_s...$4/month
/membership?level=Mariner&s_sr...$10/month
/membership?level=Pathfinder&s...$20/month
/membership?level=Visionary&s_...$40/month
https://connect.planetary.org/...External Subdomain IMG-ALT Earth and NEO in space
https://connect.planetary.org/...External Subdomain Featured Fundraising Campaign
https://connect.planetary.org/...External Subdomain Text duplicate Donate
https://www.planetary.org/issuesText duplicate Space Policy & Advocacy
https://www.planetary.org/issuesLearn More
/membership?level=Explorer&s_s...Text duplicate $4/month
/membership?level=Mariner&s_sr...Text duplicate $10/month
/membership?level=Pathfinder&s...Text duplicate $20/month
/membership?level=Visionary&s_...Text duplicate $40/month
/privacy-policyPrivacy Policy
https://www.planetary.org/worldsText duplicate Planets & Other Worlds
/space-missionsText duplicate Space Missions
/night-skyText duplicate Night Sky
/space-policyText duplicate Space Policy
https://www.planetary.org/kidsText duplicate For Kids
/articlesText duplicate Articles
/planetary-radioText duplicate Planetary Radio
/space-imagesText duplicate Space Images
https://www.planetary.org/videoText duplicate Videos
https://www.planetary.org/coursesText duplicate Courses
/planetary-reportThe Planetary Report
/action-centerAction Center
https://www.planetary.org/connectEmail Signup
/membershipText duplicate Become A Member
/about/contactContact
/membershipText duplicate Renew Membership
https://www.planetary.org/donateSupport A Project
https://www.planetary.org/shopShop to Support
https://www.planetary.org/travelText duplicate Travel
https://www.planetary.org/givingText duplicate Other Ways to Give
https://www.planetary.org/IMG-ALT The Planetary Society logo
https://www.facebook.com/plane...External Subdomain No Text
https://twitter.com/explorepla...External No Text
/rss/articlesNo Text
https://www.youtube.com/user/p...External Subdomain No Text
https://www.linkedin.com/compa...External Subdomain No Text
https://www.instagram.com/plan...External Subdomain No Text
/accountcenterText duplicate Account Center
/about/contactText duplicate Contact Us
/privacy-policyText duplicate Privacy Policy
https://www.charitynavigator.o...New window External Subdomain IMG-ALT Charity Navigator four stars
https://www.guidestar.org/prof...New window External Subdomain IMG-ALT Guidestar logo
/cookie-declarationCookie Declaration

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://www.planetary.org/"
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 of 0.46 seconds is longer than the recommended limit of 0.4 seconds. A high response time unnecessarily slows down search engine crawling and results in bad user experience as well.
The file size of the HTML document is fine (81 kB).

HTTP Response Header

NameValue
dateFri, 15 Aug 2025 18:17:10 GMT
content-typetext/html
servercloudflare
varyAccept-Encoding
strict-transport-securitymax-age=31536000
x-xss-protection1; mode=block
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN
referrer-policyno-referrer-when-downgrade
last-modifiedFri, 15 Aug 2025 11:50:02 GMT
nel{"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
cache-controlpublic, s-maxage=31536000, max-age=0
report-to{"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=V0elHqNBfr0e3B2ggbDgWaMUHgYICh8C%2BiWrQIvX6taBYqzS4Wv2rfsuWcRLqXFnKuMlfa%2B1ddb%2B73R2UKxsErZuDIhqw8nJ3nprCt2APGk%3D"}]}
age22491
cf-cache-statusHIT
content-encodingbr
cf-ray96faaff30c7ad696-CDG
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 1,101 referring domains.
This page has 12,525 backlinks.
This page has backlinks from 703 different ip addresses.

Robots.txt

# robots.txt for https://www.planetary.org/

sitemap: https://www.planetary.org/sitemaps-1-sitemap.xml

# live - don't allow web crawlers to index cpresources/ or vendor/

User-agent: *
Disallow: /cpresources/
Disallow: /vendor/
Disallow: /.env
Disallow: /index.php/actions/
Disallow: /actions/
Disallow: /*?token=*

Search preview

www.planetary.org
The Planetary Society
The Planetary Society is the largest and most effective nonprofit organization that promotes the exploration of space through education, advocacy, and...

Most important keywords

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

KeywordResultRecheck
Planetary81%Check
Planetary Society74%Check
Society63%Check
Space56%Check
space science55%Check
Science54%Check
NASA54%Check
NASA SCIENCE54%Check
Space Exploration52%Check
advancing space science51%Check

Automatically check planetary.org including all subpages at once!

Try for free
Guaranteed free of charge during trial period.

Cookie Policy

We use cookies to make our site work and also for analytics and advertising purposes. You can enable or disable optional cookies as desired. See the following links for more information.

We need these so the site can function properly

So we can better understand how visitors use our website

So we can serve you tailored ads and promotions