Esahubble.org - SEO Checker

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Overview of the SEO Check
Meta information
63% 
Page quality
85% 
Page structure
58% 
Link structure
32% 
Server
84% 
External factors
100% 
SEO Score
Response time
0.02 s
File size
78.80 kB
Words
1299
Media files
59
Number of links
315 internal / 15 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
ESA/Hubble
The page title is too short. (111 pixels of 580 max pixel length) Optimize title
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
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 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
google-site-verificationKTjYtxjG6PEMU6XMF7LY4nMnJ7MXxYaNzVY6SYTo1Qc
author[email protected]
langen
twitter:cardsummary
og:titleESA/Hubble Space Telescope
og:descriptionThe ESA page for the Hubble Space Telescope, the space-based observatory that has revolutionised modern astronomy.
og:imagehttp://www.spacetelescope.org/static/archives/images/screen/hubble_earth_sp01.jpg
og:image:secure_urlhttps://www.spacetelescope.org/static/archives/images/screen/hubble_earth_sp01.jpg
X-UA-CompatibleIE=edge
charsetutf-8

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Page quality

Content
(Critically important)
The average number of words per sentence of 29.6 words is high.
This page contains 1299 words. That's ok.
21.6% of the text are stop words.
The page contains a listing, which indicates a good text layout.
6 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.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
This page loads 6 JavaScript files. This may affect the load time negatively.
A viewport "width=device-width, initial-scale=1" is provided.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 26 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.

Media list

URLAlt attributeTitle
/assets/images/logo.9ab14af4d8f2.pngESA/Hubble logo
/assets/images/esa-logo.ef184288fbe7.pngESA logo
/media/archives/newsletters/screen/547.jpgNewsletter
...ets/frontpage/subscribe.9099c9ce8895.jpgSubscribe to Hubble news

Page structure

H1 heading
(Critically important)
There is no H1 heading specified.
Headings
(Important)
There are no headings specified on the page. Headings are important for search engine optimization and help to structure your content.

Heading structure

No headings were found.
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.
1 links don't have an anchor text.
The number of internal links is ok.
There are 15 external links on this page.

Found links on this page

LinkAttributesAnchor text
https://esahubble.org/IMG-ALT ESA/Hubble logo
https://esahubble.org/contactContact
https://esahubble.org/subscribe/Subscribe to Hubble News
https://esahubble.org/sitemap/Site Map
https://esahubble.org/search/No Text
http://www.esa.int/External Subdomain IMG-ALT ESA logo
https://esahubble.org/Home
https://esahubble.org/news/News
https://esahubble.org/news/Press Releases
/press/news-release-submission/News Release Submission Form
/news/archive/year/2024/2024
/news/archive/year/2023/2023
/news/archive/year/2022/2022
/news/archive/year/2021/2021
/news/archive/year/2020/2020
/news/archive/year/2019/2019
/news/archive/year/2018/2018
/news/archive/year/2017/2017
/news/archive/year/2016/2016
/news/archive/year/2015/2015
/news/archive/year/2014/2014
/news/archive/year/2013/2013
/news/archive/year/2012/2012
/news/archive/year/2011/2011
/news/archive/year/2010/2010
/news/archive/year/2009/2009
/news/archive/year/2008/2008
/news/archive/year/2007/2007
/news/archive/year/2006/2006
/news/archive/year/2005/2005
/news/archive/year/2004/2004
/news/archive/year/2003/2003
/news/archive/year/2002/2002
/news/archive/year/2001/2001
/news/archive/year/2000/2000
/news/archive/year/1999/1999
/announcements/Announcements
/announcements/archive/year/2024/Text duplicate 2024
/announcements/archive/year/2023/Text duplicate 2023
/announcements/archive/year/2022/Text duplicate 2022
/announcements/archive/year/2021/Text duplicate 2021
/announcements/archive/year/2020/Text duplicate 2020
/announcements/archive/year/2019/Text duplicate 2019
/announcements/archive/year/2018/Text duplicate 2018
/announcements/archive/year/2017/Text duplicate 2017
/announcements/archive/year/2016/Text duplicate 2016
/announcements/archive/year/2015/Text duplicate 2015
/announcements/archive/year/2014/Text duplicate 2014
/announcements/archive/year/2013/Text duplicate 2013
/announcements/archive/year/2012/Text duplicate 2012
/announcements/archive/year/2011/Text duplicate 2011
/announcements/archive/year/2010/Text duplicate 2010
/announcements/archive/year/2009/Text duplicate 2009
/announcements/archive/year/2008/Text duplicate 2008
/announcements/archive/year/2007/Text duplicate 2007
/announcements/archive/year/2006/Text duplicate 2006
/images/potw/Picture of the Week
/images/potw/archive/year/2024/Text duplicate 2024
/images/potw/archive/year/2023/Text duplicate 2023
/images/potw/archive/year/2022/Text duplicate 2022
/images/potw/archive/year/2021/Text duplicate 2021
/images/potw/archive/year/2020/Text duplicate 2020
/images/potw/archive/year/2019/Text duplicate 2019
/images/potw/archive/year/2018/Text duplicate 2018
/images/potw/archive/year/2017/Text duplicate 2017
/images/potw/archive/year/2016/Text duplicate 2016
/images/potw/archive/year/2015/Text duplicate 2015
/images/potw/archive/year/2014/Text duplicate 2014
/images/potw/archive/year/2013/Text duplicate 2013
/images/potw/archive/year/2012/Text duplicate 2012
/images/potw/archive/year/2011/Text duplicate 2011
/images/potw/archive/year/2010/Text duplicate 2010
https://esahubble.org/images/Images
/images/viewall/View All
/images/archive/top100/Top 100
/static/images/zip/top100/top1...Top 100 Large Size (ZIP file, 1.2GB)
/static/images/zip/top100/top1...Top 100 Original Size (ZIP file, 4.7GB)
https://esahubble.org/images/Categories
/images/archive/category/anniv...Anniversary
/images/archive/category/cosmo...Cosmology
/images/archive/category/exopl...Exoplanets
/images/archive/category/galax...Galaxies
/images/archive/category/illus...Illustrations
/images/archive/category/jwst/James Webb Space Telescope
/images/archive/category/mission/Launch/Servicing Missions
/images/archive/category/misc/Miscellaneous
/images/archive/category/nebulae/Nebulae
/images/archive/category/black...Quasars & Black Holes
/images/archive/category/solar...Solar System
/images/archive/category/space...Spacecraft
/images/archive/category/starc...Star Clusters
/images/archive/category/stars/Stars
/press/image_formats/Image Formats
/images/potw/Text duplicate Picture of the Week
/images/search/Advanced Search
https://www.spacetelescope.org...External Subdomain Usage of Images and Videos
https://esahubble.org/videos/Videos
/videos/viewall/Text duplicate View All
https://esahubble.org/videos/Text duplicate Categories
/videos/archive/category/3d/3D Animations
/videos/archive/category/cosmo...Text duplicate Cosmology
/videos/archive/category/fulld...Fulldome
/videos/archive/category/extra...Text duplicate Exoplanets
/videos/archive/category/eyeso...Eyes on the Skies DVD
/videos/archive/category/galax...Text duplicate Galaxies
/videos/archive/category/hd/HD Videos
/videos/archive/category/dvd/Hubble 15 Years DVD
/videos/archive/category/hubble/Hubble Images Videos
/videos/archive/category/hubbl...Hubblecast
/videos/archive/category/jwst/Text duplicate James Webb Space Telescope
/videos/archive/category/misc/Text duplicate Miscellaneous
/videos/archive/category/nebulae/Text duplicate Nebulae
/videos/archive/category/black...Text duplicate Quasars & Black Holes
/videos/archive/category/solar...Text duplicate Solar System
/videos/archive/category/space...Text duplicate Spacecraft
/videos/archive/category/space...Space Sparks
/videos/archive/category/clust...Text duplicate Star Clusters
/videos/archive/category/stars/Text duplicate Stars
/press/video_formats/Video Formats
/videos/search/Text duplicate Advanced Search
https://www.spacetelescope.org...External Subdomain Text duplicate Usage of Images and Videos
/newsletters/Newsletters
/newsletters/hubblenews/ESA/Hubble News
/forscientists/announcements/Science Announcements
/newsletters/science/ESA/Hubble/Webb Science Newsletter
/subscribe-science/Subscribe to the ESA/Hubble/Webb Science Newsletter
https://esahubble.org/products/Initiatives
https://esahubble.org/wordbank/Word Bank
/products/calendars/Calendars
/products/calendars/archive/ye...Text duplicate 2024
/products/calendars/archive/ye...Text duplicate 2023
/products/calendars/archive/ye...Text duplicate 2022
/products/calendars/archive/ye...Text duplicate 2021
/products/calendars/archive/ye...Text duplicate 2020
/products/calendars/archive/ye...Text duplicate 2013
/products/calendars/archive/ye...Text duplicate 2012
/products/calendars/archive/ye...Text duplicate 2011
/products/calendars/archive/ye...Text duplicate 2010
/products/calendars/archive/ye...Text duplicate 2009
/products/calendars/archive/ye...Text duplicate 2008
/products/calendars/archive/ye...Text duplicate 2007
/products/calendars/archive/ye...Text duplicate 2006
/products/calendars/archive/ye...Text duplicate 2005
/products/calendars/archive/ye...Text duplicate 2004
/projects/ourplaceinspace/Our Place in Space
/announcements/ann2009/30th Anniversary Creations
/projects/Hubble31/31st Anniversary
/projects/Hubble30/30th Anniversary
/projects/Hubble25/25th Anniversary
/projects/Hubble25/odetohubble/Ode to Hubble Competition
/projects/Hubble25/fulldome/Fulldome Clips
http://www.stsci.edu/institute...External Subdomain Symposium
/projects/Hubble25/imageunveil...Image Unveilings Across Europe
/projects/Hubble25/resources/Resources
/projects/20anniversary/20th Anniversary
/projects/20anniversary/events/Events and Exhibitions
/projects/20anniversary/hubble...Hubble Pop Culture Contest
/projects/anniversary/15th Anniversary
/news/?search=15thNews Release
/projects/anniversary/movie_dvd/Movie DVD
/projects/anniversary/partners/Partners
/projects/anniversary/events/Hubble Day Events
/projects/anniversary/educatio...Educational Material
/projects/anniversary/soundtrack/Soundtrack
/projects/anniversary/book/Hubble Anniversary Book
/projects/anniversary/outlets/Outlets/resellers
/projects/anniversary/producti...About the Production Team
/products/print_posters/hst_pr...Poster
/projects/anniversary/planetar...Planetarium Show Package
/projects/anniversary/credits/Credits
/products/exhibitions/Exhibitions
/projects/ourplaceinspace/Text duplicate Our Place in Space
/projects/ourplaceinspace/rooms/OPiS room description
/products/applications/Applications
/projects/fits_liberator/FITS Liberator
/projects/fits_liberator/news/Text duplicate News
/projects/fits_liberator/downl...Download
https://noirlab.edu/public/pro...External User Guide (PDF)
/projects/fits_liberator/improc/Image processing introduction
/projects/fits_liberator/fitsf...FITS for education
/projects/fits_liberator/datas...Example data sets and links to archives
/projects/fits_liberator/fitsi...User's Gallery
/projects/fits_liberator/known...Known issues and FAQ
/projects/fits_liberator/downl...Download past versions
/projects/fits_liberator/docum...Documents
/projects/fits_liberator/stepb...Step-by-step guide to making your own images
https://esahubble.org/projects/Projects
/projects/hiddentreasures/Hidden Treasures
/products/public-resource/virt...Virtual Meeting Backgrounds
https://esahubble.org/about/About
/about/general/fact_sheet/General
/about/general/fact_sheet/Fact Sheet
/about/general/instruments/Instruments
/about/general/instruments/wfc3/WFC3
/about/general/instruments/acs/ACS
/about/general/instruments/cos/COS
/about/general/instruments/stis/STIS
/about/general/instruments/nic...NICMOS
/about/general/instruments/fgs/FGS
/about/general/instruments/wfpc2/WFPC2
/about/general/instruments/wfpc1/WFPC1
/about/general/instruments/cos...COSTAR
/about/general/instruments/foc/FOC
/about/general/instruments/fos/FOS
/about/general/instruments/ghrs/GHRS
/about/general/instruments/hsp/HSP
/about/general/operations/Operations
/about/general/institutions/Institutions
/about/general/solar_panels/Solar Panels
/about/general/gyroscopes/Gyroscopes
/about/general/batteries/Batteries
/about/general/soft_capture/Soft Capture
https://esahubble.org/science/Science
/science/deep_fields/The Hubble Deep Fields
/science/age_size/Age and size of the Universe
/science/stellar_evolution/The lives of stars
/science/our_solar_system/The solar neighbourhood
/science/protoplanetary_extras...Exoplanets and proto-planetary discs
/science/black_holes/Black Holes, Quasars, and Active Galaxies
/science/formation_of_stars/Formation of stars
/science/composition_of_universe/Composition of the Universe
/science/gravitational_lensing/Gravitational lenses
/science/gravitational_waves/Multi-messenger astronomy
/science/europe_hubble/Europe & Hubble
/about/history/History
/about/history/timeline/Timeline
/about/history/launch_1990/Launch 1990
/about/history/servicing_missi...Servicing Mission 1
/about/history/servicing_missi...Servicing Mission 2
/about/history/servicing_missi...Servicing Mission 3A
/about/history/servicing_missi...Servicing Mission 3B
/about/history/servicing_missi...Servicing Mission 4
/about/history/imax/IMAX Camera
/about/history/tools/Tools
/about/history/thermal/Thermal
/about/history/crew/Crew
/about/history/acs_repair/ACS Repair
/about/history/stis_repair/STIS Repair
/about/history/sm4_timeline/SM4 Timeline
/about/history/esa/ESA
/about/history/the_scientist_b...The scientist behind the name
/about/history/the-mother-of-h...The mother of Hubble
/about/history/aberration_prob...Hubble's mirror problem
https://esahubble.org/about/faq/FAQ
/about/glossary/Glossary
/about/esa-hubble-team/outreac...ESA/Hubble Outreach Team
/about/further_information/bro...Further Information
https://esahubble.org/press/kits/Press Kits
https://esahubble.org/press/Press
https://esahubble.org/copyright/Usage of ESA/Hubble Images and Videos
https://esahubble.org/press/kits/Text duplicate Press Kits
https://esahubble.org/subscribe/Subscribe to ESA/Hubble News
/press/interview_possibilities/Interview Possibilities
/press/mailinglist/Press Mailing List
/press/video_formats/Text duplicate Video Formats
/press/image_formats/Text duplicate Image Formats
/news/heic2408/heic2408 — Photo Release Hubble celebrates 34th anniversary with a look at the Little Dumbbell Nebula In celebration of the 34th anniversary of the launch of...
IMG-ALT Little Dumbbell Nebula (M76)
/news/heic2407/heic2407 — Science Release Hubble goes hunting for small main-belt asteroids Astronomers recently used a trove of archived images taken by the NASA/ESA Hubbl...
IMG-ALT Asteroid photobombs Hubble snapshot of Galaxy UGC 12158
/news/heic2406/heic2406 — Photo Release Hubble sees new star proclaiming its presence with cosmic light show Jets emerge from the cocoon of a newly forming star to blast ac...
IMG-ALT FS Tau
/news/heic2405/heic2405 — Science Release Hubble finds that ageing brown dwarfs grow lonely It takes two to tango, but in the case of brown dwarfs that were once paired as ...
IMG-ALT Brown dwarf (artist’s concept)
/news/heic2404/heic2404 — Photo Release Hubble tracks Jupiter's stormy weather The giant planet Jupiter, in all its banded glory, is revisited by the NASA/ESA Hubble Space ...
IMG-ALT Hubble’s two new views of Jupiter (January 2024)
/announcements/What's New
/announcements/ann2302/Announcement of the 2024 ESA Hubble and Webb Calendar 15 Dec. 2023 — ann2302
IMG-ALT Cover page of the 2024 ESA/Hubble and ESA/Webb calendar
/announcements/ann2301/Announcement of Opportunity for ESA-appointed representatives to join the NASA-GOMAP START team for the Habitable Worlds Observatory 24 Oct. 2023 — ann2301
IMG-ALT Exomoon orbiting its planet (artist’s impression)
/announcements/ann2202/Announcement of the 2023 ESA Hubble and Webb Calendar 19 Dec. 2022 — ann2202
IMG-ALT Cover Page of the 2023 ESA/Hubble and ESA/Webb Calendar
/announcements/ann2201/The new European Hubble Space Telescope (eHST) Science Archive 2 Dec. 2022 — ann2201
IMG-ALT eHST User Interface
/announcements/ann2110/Release of the 2022 ESA/Hubble Calendar 16 Dec. 2021 — ann2110
IMG-ALT Cover Page of the 2022 ESA/Hubble Calendar
/announcements/ann2109/Announcement of the ESA/Hubble and ESA Sky Collaboration 20 Oct. 2021 — ann2109
IMG-ALT Announcement of the ESA/Hubble and ESA Sky Collaboration
/announcements/ann2108/Announcement of the ESA/Hubble Word Bank 28 July 2021 — ann2108
IMG-ALT The ESA/Hubble Word Bank
/announcements/ann2107/New ESA/Hubble Online Assets: A Social Celebration of Hubble 14 May 2021 — ann2107
IMG-ALT New ESA/Hubble Online Assets
/announcements/ann2106/Announcement of the ESA/Hubble Chrome Browser Application 14 April 2021 — ann2106
IMG-ALT Announcement of the ESA/Hubble Chrome Browser Plugin Application
/announcements/ann2105/Announcement of the ESA/Hubble GIPHY Account 7 April 2021 — ann2105
IMG-ALT Announcement of the ESA/Hubble GIPHY Account
/announcements/ann2104/Release of FITS Liberator 4 18 March 2021 — ann2104
IMG-ALT Screenshot of the NOIRLab/IPAC/ESA/STScI/CfA FITS Liberator version 4
/announcements/ann2103/Interact with ESA/Hubble's Images with New App 3 March 2021 — ann2103
IMG-ALT Exploring the Interactive ESA/Hubble image app
/announcements/ann2102/Announcement of the new Space Sparks Video Series 17 Feb. 2021 — ann2102
IMG-ALT ESA/Hubble Space Sparks Video Series
/announcements/ann2101/Release of the 2021 ESA/Hubble Calendar 1 Jan. 2021 — ann2101
IMG-ALT Hubble Space Telescope Calendar 2021 cover
/announcements/ann2010/Hubblecast 133: Spectroscopy with Hubble 16 Dec. 2020 — ann2010
IMG-ALT Screenshot of Hubblecast 133
/announcements/ann2009/Explore the Creations Submitted for Hubble’s 30th Anniversary! 26 Aug. 2020 — ann2009
IMG-ALT Collage of Hubble 30 Artistic Creations
/announcements/ann2008/Two New Hubblecasts Released for Hubble’s 30th Anniversary 27 April 2020 — ann2008
IMG-ALT Screenshot of Hubblecast 128
/announcements/ann2007/Call for Artistic Creations: Let’s Say Thank You to Hubble! 24 April 2020 — ann2007
IMG-ALT Call for Artistic Creations: Let’s Say Thank You to Hubble!
/announcements/ann2006/Media Advisory: Hubble Space Telescope 30th Anniversary 23 April 2020 — ann2006
IMG-ALT Media Advisory: Hubble 30
/announcements/ann2005/Wish Hubble a Happy Birthday! 10 April 2020 — ann2005
IMG-ALT Let’s Wish Hubble a Happy Birthday!
/images/potw/Text duplicate Picture of the Week
/images/potw2418a/29 April 2024 — potw2418 On the hunt for X-rays
IMG-ALT On the hunt for X-rays
/images/potw2417a/22 April 2024 — potw2417 Captured on glass
IMG-ALT Captured on glass
/images/potw2416a/15 April 2024 — potw2416 The eponymous NGC 3783
IMG-ALT The eponymous NGC 3783
/images/potw2415a/8 April 2024 — potw2415 Hidden in a dark cloud
IMG-ALT Hidden in a dark cloud
/images/potw2414a/1 April 2024 — potw2414 Two’s company
IMG-ALT Two’s company
/images/potw2413a/25 March 2024 — potw2413 No zoom
IMG-ALT No zoom
/images/potw2412a/18 March 2024 — potw2412 The Spider (and not its web)
IMG-ALT The Spider (and not its web)
/images/potw2411a/11 March 2024 — potw2411 An unlikely spiral
IMG-ALT An unlikely spiral
/images/potw2410a/4 March 2024 — potw2410 A matter of perspective
IMG-ALT A matter of perspective
/images/potw2409a/26 February 2024 — potw2409 Celestial fossils
IMG-ALT Celestial fossils
/videos/archive/category/space...Space sparks
/videos/heic2408a/23 April 2024 — heic2408a Space Sparks Episode 19 — Hubble celebrates its 34th anniversary
/newsletters/scienceESA/Hubble science Newsletter
/newsletters/science/html/547/ESA/Hubble/Webb Science Newsletter - March 2024
IMG-ALT Newsletter
https://www.facebook.com/hubbl...External Subdomain Hubble Space Telescope
https://twitter.com/HUBBLE_spa...External Tweets by HUBBLE_space
/images/archive/top100/Top 100 Images
/images/heic2017a/Hubble's View of Jupiter and Europa in August 2020
IMG-ALT Hubble's View of Jupiter and Europa in August 2020
/images/heic2007a/Tapestry of Blazing Starbirth
IMG-ALT Tapestry of Blazing Starbirth
/images/heic1509a/Westerlund 2 — Hubble’s 25th anniversary image
IMG-ALT Westerlund 2 — Hubble’s 25th anniversary image
/images/heic1501a/New view of the Pillars of Creation — visible
IMG-ALT New view of the Pillars of Creation — visible
/images/potw2050a/Rings of Relativity
IMG-ALT Rings of Relativity
/images/heic2018b/Galaxy NGC 2525
IMG-ALT Galaxy NGC 2525
/images/heic0715a/Extreme star cluster bursts into life in new Hubble image
IMG-ALT Extreme star cluster bursts into life in new Hubble image
/images/heic1608a/The Bubble Nebula
IMG-ALT The Bubble Nebula
/images/potw1345a/Antennae Galaxies reloaded
IMG-ALT Antennae Galaxies reloaded
/images/heic1307a/New infrared view of the Horsehead Nebula — Hubble’s 23rd anniversary image
IMG-ALT New infrared view of the Horsehead Nebula — Hubble’s 23rd anniversary image
/images/heic0817a/Magnetic monster NGC 1275
IMG-ALT Magnetic monster NGC 1275
/images/heic0406a/Hubble sees galaxies galore
IMG-ALT Hubble sees galaxies galore
/images/potw2049a/The Stellar Forge
IMG-ALT The Stellar Forge
/images/opo0328a/Hubble mosaic of the majestic Sombrero Galaxy
IMG-ALT Hubble mosaic of the majestic Sombrero Galaxy
/images/heic1917a/Latest Saturn Portrait
IMG-ALT Latest Saturn Portrait
/images/heic0702a/New stars shed light on the past
IMG-ALT New stars shed light on the past
/images/heic0515a/Most detailed image of the Crab Nebula
IMG-ALT Most detailed image of the Crab Nebula
/images/heic1808a/Hubble's 28th birthday picture: The Lagoon Nebula
IMG-ALT Hubble's 28th birthday picture: The Lagoon Nebula
/images/potw1811a/Spirals and supernovae
IMG-ALT Spirals and supernovae
/images/heic0910h/Butterfly emerges from stellar demise in planetary nebula NGC 6302
IMG-ALT Butterfly emerges from stellar demise in planetary nebula NGC 6302
https://esahubble.org/newslettersIMG-ALT Subscribe to Hubble news
http://www.facebook.com/HubbleESAExternal Subdomain No Text
http://twitter.com/hubble_spaceExternal No Text
http://www.youtube.com/user/Hu...External Subdomain No Text
http://www.flickr.com/photos/h...External Subdomain No Text
https://www.instagram.com/hubb...External Subdomain No Text
https://www.linkedin.com/compa...External Subdomain No Text
https://giphy.com/channel/esah...External No Text
/about/privacy/Privacy policy
http://www.cdn77.com/External Subdomain Accelerated by CDN77

Server configuration

HTTP redirects
(Critically important)
The checked page does not redirect to another URL.
HTTP header
(Important)
The web server version is sent within the HTTP header.
No X-Powered HTTP header is sent.
This page uses GZip for compressed data transmission.
Performance
(Somewhat important)
This page loads 6 JavaScript files. This may affect the load time negatively.
The page response time is excellent with 0.02 seconds.
This page only loads 3 CSS files. That's ok.
The file size of the HTML document is fine (79 kB).

HTTP Response Header

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