Sdss.org - SEO Checker

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Overview of the SEO Check
Meta information
61% 
Page quality
74% 
Page structure
71% 
Link structure
25% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.18 s
File size
75.40 kB
Words
827
Media files
22
Number of links
91 internal / 14 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Sloan Digital Sky Survey-V: Pioneering Panoptic Spectroscopy - SDSS-V
The page title should be shorter than 580 pixels. It is 655 pixels long. Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
The Sloan Digital Sky Survey-V (SDSS-V) is the first facility providing multi-epoch optical & IR spectroscopy across the entire sky, as well as offering contiguous integral-field spectroscopic coverage of the Milky Way and Local Volume galaxies.
The meta description is too long: 1496 pixels from max. 1000 pixels. Optimize description
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://sdss.org/
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)
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 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
descriptionThe Sloan Digital Sky Survey-V (SDSS-V) is the first facility providing multi-epoch optical & IR spectroscopy across the entire sky, as well as offering contiguous integral-field spectroscopic coverage of the Milky Way and Local Volume galaxies.
robotsmax-image-preview:large
generatorWordPress 6.6
msapplication-TileImagehttps://sdss.org/wp-content/uploads/2022/04/cropped-cropped-site_icon_SDSSV-270x270.png
langen-us
twitter:cardsummary_large_image
twitter:titleSloan Digital Sky Survey-V: Pioneering Panoptic Spectroscopy - SDSS-V
twitter:descriptionThe Sloan Digital Sky Survey-V (SDSS-V) is the first facility providing multi-epoch optical & IR spectroscopy across the entire sky, as well as offering contiguous integral-field spectroscopic coverage of the Milky Way and Local Volume galaxies.
twitter:imagehttps://sdss.org/wp-content/uploads/2022/09/sdss-new-logo-72dpi.png
og:localeen_US
og:site_nameSDSS - Mapping the Universe
og:typewebsite
og:titleSloan Digital Sky Survey-V: Pioneering Panoptic Spectroscopy - SDSS-V
og:descriptionThe Sloan Digital Sky Survey-V (SDSS-V) is the first facility providing multi-epoch optical & IR spectroscopy across the entire sky, as well as offering contiguous integral-field spectroscopic coverage of the Milky Way and Local Volume galaxies.
og:urlhttps://sdss.org/
og:imagehttps://sdss.org/wp-content/uploads/2022/09/sdss-new-logo-72dpi.png
og:image:secure_urlhttps://sdss.org/wp-content/uploads/2022/09/sdss-new-logo-72dpi.png
charsetUTF-8

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Page quality

Content
(Critically important)
Some words from the page title are not used within the pages content
This page contains 827 words. That's ok.
31.1% of the text are stop words.
The page contains a listing, which indicates a good text layout.
5 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 19.29 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
A viewport "width=device-width, initial-scale=1.0" 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 17 tags for this page.
Image SEO
(Somewhat important)
15 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
.../uploads/2022/09/sdss-new-logo-72dpi.pngSDSS
...loads/2022/04/sdss5-banner-1024x382.jpegNo alt attribute providedsdss5-banner
...way_universe-137494-cropped-999x373.jpegNo alt attribute providedstar_galaxy_sky_milky_way_universe-137494-cropped
..._stars_clouds-92966-cropped-999x373.jpegNo alt attribute providednight_milkyway_night_sky_stars_clouds-92966-cropped
..._night_pink-1237396-cropped-999x373.jpegNo alt attribute providedstar_color_space_night_pink-1237396-cropped
...it_sky_stars-926554-cropped-999x373.jpegNo alt attribute providedastronomy_galaxy_milky_way_night_sky_orbit_sky_stars-926554-cropped
...nt/uploads/2023/01/orion-for-databox.pngNo alt attribute providedorion-for-databox
...ent/uploads/2023/01/qso-for-data-box.pngNo alt attribute providedqso-for-data-box
...gee-ir-milkyway-for-databox-1024x382.pngNo alt attribute providedapogee-ir-milkyway-for-databox
...ploads/2023/01/milky-way-for-databox.pngNo alt attribute providedmilky-way-for-databox
/wp-content/uploads/2024/06/bal-preview.pngNo alt attribute providedbal-preview
..._comic_highres_numbers_1920-1024x382.jpgNo alt attribute providedpress_comic_highres_numbers_1920
...loads/2023/08/red-lvm-night-1024x382.pngNo alt attribute providedred-lvm-night
...22/04/robot-feature-image-1024x382-1.pngNo alt attribute providedrobot-feature-image-1024x382-1
.../2022/04/TFitzpatrick_exhibit_cover.jpegNo alt attribute providedTFitzpatrick_exhibit_cover
...oads/2022/04/sdssfirstlight-1024x382.pngNo alt attribute providedsdssfirstlight
...ds/2022/04/Gaia_s_sky_in_colour_sm-1.jpgMap of the Milky Way from the Gaia spacecraft
...-NGC_346_in_Small_magellanic_cloud-1.jpgImage of the Small Magellanic Cloud
...x-Artists_rendering_ULAS_J11200641-1.jpgArtist's impression of a quasar
.../06/Logo-2B-SMALL-Gold-Blue-1024x200.pngAlfred P. Sloan Foundation logo
...06/HSF_logo_horiz_RGB_760px-1024x194.pngHeising-Simons Foundation logo
...SF_4-Color_bitmap_Logo-380px-150x150.pngU.S. National Science Foundation logo

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.

Heading structure

Heading levelContent
H2 Data
H2 News
H2 JOIN US!
H3 Astronomers find quasar winds speeding up
H3 The “Barbenheimer Star”: Evidence for Spectacular Nucleosynthesis in the Early Universe
H3 Mapping Everything Everywhere All At Once
H3 SDSS-V's Robots Turn their Eyes to the Sky
H3 Serving Up the Universe on a Plate
H3 Next-Gen Astronomical Survey Makes its First Observations Toward a New Understanding of the Cosmos
H3 Milky Way Mapper
H3 Local Volume Mapper
H3 Black Hole Mapper
H3 Explore
H3 Learn
H3 Connect
H4 Program Head
H4 Program Head Duplicate text
H4 Program Head Duplicate text
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.
25 links don't have an anchor text.
The number of internal links is ok.
There are 14 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://sdss.org/Anchor Skip to content
https://sdss.org/dr18/Data Release 18
https://sdss.org/IMG-ALT SDSS
https://sdss.org/dr18/Data
A-TITLE Data
https://sdss.org/mappers/Mappers
A-TITLE Mappers
https://sdss.org/dr18/mwm/about/About Milky Way Mapper
A-TITLE About Milky Way Mapper
https://sdss.org/dr18/lvm/about/About Local Volume Mapper
A-TITLE About Local Volume Mapper
https://sdss.org/dr18/bhm/about/About Black Hole Mapper
A-TITLE About Black Hole Mapper
https://sdss.org/instruments/Instruments
A-TITLE Instruments
https://sdss.org/collaboration/Collaboration
A-TITLE Collaboration
https://sdss.org/science/Science
A-TITLE Science
https://sdss.org/science/Results
A-TITLE Results
https://sdss.org/news/News
A-TITLE News
/science/publications/Publications
A-TITLE Publications
https://sdss.org/blog/Science Blog
A-TITLE Science Blog
https://sdss.org/education/Education
A-TITLE Education
https://sdss.org/contact-us/Contact
A-TITLE Contact
https://sdss.org/dr18/Text duplicate Data
https://sdss.org/dr18/DR18
https://sdss.org/dr18/bhm/Black Hole Mapper
https://sdss.org/dr18/mwm/Milky Way Mapper
/dr18/bhm/programs/spiders/eFEDS spectra
/dr18/data_access/value-added-...value added catalogs.
https://sdss.org/dr18/DR18 webpages
https://ui.adsabs.harvard.edu/...New window External Subdomain DR18 paper
/dr18/completed_surveys/completed surveys
https://www.sdss4.org/New window External Subdomain SDSS-IV webpages
https://sdss4.org/dr17/imagingNew window External Imaging and Legacy Survey,
http://classic.sdss.org/supern...New window External Subdomain Supernova Survey
https://www.sdss4.org/dr17/spe...New window External Subdomain SEGUE1/2
https://www.sdss4.org/dr17/mar...New window External Subdomain MARVELS
https://www.sdss4.org/dr17/spe...New window External Subdomain (e)BOSS
https://www.sdss4.org/dr17/irs...New window External Subdomain APOGEE-1/2
https://www.sdss4.org/dr17/manga/New window External Subdomain MaNGA
https://www.sdss4.org/dr17/mas...New window External Subdomain MaStar
https://sdss.org/news/Text duplicate News
/astronomers-find-quasar-winds...Astronomers find quasar winds speeding up
/astronomers-find-quasar-winds...June 11, 2024
/astronomers-find-quasar-winds...A team of astronomers from the Sloan Digital Sky Survey has used eight years of careful, constant observations to discover unexpected changes in the winds su...
/barbenheimer-star/No Text
/barbenheimer-star/No Text
/barbenheimer-star/The “Barbenheimer Star”: Evidence for Spectacular Nucleosynthesis in the Early Universe
/barbenheimer-star/No Text
/barbenheimer-star/January 10, 2024
/barbenheimer-star/No Text
/barbenheimer-star/Astronomy’s new blockbuster is now playing in New Orleans. Astronomers from the Sloan Digital Sky Survey (SDSS) have discovered evidence for what they call t...
/barbenheimer-star/No Text
/mapping-everything-everywhere...No Text
/mapping-everything-everywhere...No Text
/mapping-everything-everywhere...Mapping Everything Everywhere All At Once
/mapping-everything-everywhere...No Text
/mapping-everything-everywhere...August 2, 2023
/mapping-everything-everywhere...No Text
/mapping-everything-everywhere...The newest mapmaking effort of the long-running Sloan Digital Sky Survey has begun. The Local Volume Mapper (LVM) Instrument has seen first science light.
/mapping-everything-everywhere...No Text
/sdss-vs-robots-turn-their-eye...No Text
/sdss-vs-robots-turn-their-eye...No Text
/sdss-vs-robots-turn-their-eye...SDSS-V's Robots Turn their Eyes to the Sky
/sdss-vs-robots-turn-their-eye...No Text
/sdss-vs-robots-turn-their-eye...January 11, 2022
/sdss-vs-robots-turn-their-eye...No Text
/sdss-vs-robots-turn-their-eye...After twenty-one years of observers loading heavy aluminum plates night after night, the Sloan Digital Sky Survey (SDSS) is now seeing the cosmos through rob...
/sdss-vs-robots-turn-their-eye...No Text
/serving-up-the-universe-on-a-...No Text
/serving-up-the-universe-on-a-...No Text
/serving-up-the-universe-on-a-...Serving Up the Universe on a Plate
/serving-up-the-universe-on-a-...No Text
/serving-up-the-universe-on-a-...July 13, 2021
/serving-up-the-universe-on-a-...No Text
/serving-up-the-universe-on-a-...They may not look like much — just metal disks 80 centimeters (30 inches) across with some etched markings and hundreds of small holes — but round aluminum “...
/serving-up-the-universe-on-a-...No Text
/next-gen-astronomical-survey-...No Text
/next-gen-astronomical-survey-...No Text
/next-gen-astronomical-survey-...Next-Gen Astronomical Survey Makes its First Observations Toward a New Understanding of the Cosmos
/next-gen-astronomical-survey-...No Text
/next-gen-astronomical-survey-...November 2, 2020
/next-gen-astronomical-survey-...No Text
/next-gen-astronomical-survey-...The Sloan Digital Sky Survey’s fifth generation collected its very first observations of the cosmos at 1:47 a.m. on October 24, 2020. As the world’s first al...
/next-gen-astronomical-survey-...No Text
https://sdss.org/dr18/mwm/about/Text duplicate Milky Way Mapper
https://sdss.org/dr18/mwm/about/IMG-ALT Map of the Milky Way from the Gaia spacecraft
https://sdss.org/dr18/mwm/about/Explore MWM
https://sdss.org/dr18/lvm/about/Local Volume Mapper
https://sdss.org/dr18/lvm/about/IMG-ALT Image of the Small Magellanic Cloud
https://sdss.org/dr18/lvm/about/Explore LVM
https://sdss.org/dr18/bhm/about/Text duplicate Black Hole Mapper
https://sdss.org/dr18/bhm/about/IMG-ALT Artist's impression of a quasar
https://sdss.org/dr18/bhm/about/Explore BHM
/wp-content/uploads/2022/04/sd...New window Joining Document
/wp-content/uploads/2024/04/SD...New window Principles of Operation
/collaboration/affiliate-insti...New window Affiliate Institutions
https://sdss.org/dr18/Text duplicate Data Release 18
/dr18/data_access/Data Access
https://sdss.org/dr18/tutorials/Tutorials
/dr18/data_access/value-added-...Value Added Catalogs
https://sdss.org/mappers/Text duplicate Mappers
https://sdss.org/instruments/Text duplicate Instruments
https://sdss.org/education/Text duplicate Education
https://sdss.org/science/Text duplicate Science
https://sdss.org/contact-us/Contact Us
https://www.facebook.com/SDSSu...New window External Subdomain Facebook
https://sdss.org/people/SDSS People
https://www.sloan.org/New window External Subdomain IMG-ALT Alfred P. Sloan Foundation logo
https://www.hsfoundation.org/New window External Subdomain IMG-ALT Heising-Simons Foundation logo
https://www.nsf.gov/New window External Subdomain IMG-ALT U.S. National Science Foundation logo

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://sdss.org/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
The page response time is excellent with 0.18 seconds.
The file size of the HTML document is fine (75 kB).

HTTP Response Header

NameValue
cache-controlpublic, max-age=604800
content-encodinggzip
content-typetext/html; charset=UTF-8
link<https://sdss.org/wp-json/>; rel="https://api.w.org/"
servernginx
strict-transport-securitymax-age=300
x-pantheon-styx-hostnamestyx-fe3-a-697744c748-jjgcn
x-styx-req-idd4b1a02a-a208-11ef-bff3-ee23dfb8ae68
dateThu, 14 Nov 2024 02:45:25 GMT
x-served-bycache-chi-klot8100038-CHI, cache-fra-eddf8230040-FRA
x-cacheHIT, HIT
x-cache-hits2, 0
x-timerS1731552325.397866,VS0,VE3
varyAccept-Encoding, Cookie, Cookie
age17896
accept-rangesbytes
via1.1 varnish, 1.1 varnish
content-length19404
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 4,153 referring domains.
This page has 1,062,695 backlinks.
This page has backlinks from 2,636 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

User-agent: *
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php

Sitemap: https://sdss.org/sitemap.xml
Sitemap: https://sdss.org/sitemap.rss

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sdss.org
Sloan Digital Sky Survey-V: Pioneering Panoptic Spectroscopy - SDSS-V
The Sloan Digital Sky Survey-V (SDSS-V) is the first facility providing multi-epoch optical & IR spectroscopy across the entire sky, as well as offering contiguous integral-field spectroscopic coverage of the Milky Way and Local Volume galaxies.

Most important keywords

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

KeywordResultRecheck
SDSS83%Check
sky65%Check
SDSS-V65%Check
survey62%Check
Sloan Digital Sky61%Check
Sloan Digital Sky Survey61%Check
Sloan59%Check
Digital58%Check
Way56%Check
Milky56%Check
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