File:Hubble and Gaia measure Cepheid variable stars (42731139234).jpg
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[edit]DescriptionHubble and Gaia measure Cepheid variable stars (42731139234).jpg |
Using two of the world’s most powerful space telescopes — the NASA/ESA Hubble Space Telescope and ESA’s Gaia — astronomers have made the most precise measurements to date of the Universe’s expansion rate. This is calculated by gauging the distances between nearby galaxies using special types of stars called Cepheid variables as cosmic yardsticks. By comparing their intrinsic brightness — measured with Hubble — with their apparent brightness as seen from Earth, scientists can calculate their distances. Gaia further refines this yardstick by measuring the distances to Cepheid variables within our Milky Way Galaxy using astrometry. This allowed astronomers to more precisely calibrate the distances to Cepheids that are seen in other galaxies. More information: <a href="https://spacetelescope.org/images/opo1834a/" rel="nofollow">spacetelescope.org/images/opo1834a/</a> Credit: NASA, ESA, and A. Feild (STScI) |
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Source | Hubble and Gaia measure Cepheid variable stars |
Author | Hubble ESA |
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This image was originally posted to Flickr by Hubble Space Telescope / ESA at https://flickr.com/photos/51268976@N08/42731139234. It was reviewed on 7 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
7 December 2020
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current | 15:13, 7 December 2020 | 1,280 × 1,336 (346 KB) | Eyes Roger (talk | contribs) | Transferred from Flickr via #flickr2commons |
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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Credit/Provider | NASA, ESA, and A. Feild (STScI) |
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Source | ESA/Hubble |
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Software used | Adobe Photoshop CC 2017 (Macintosh) |
File change date and time | 14:25, 9 July 2018 |
Date and time of digitizing | 14:11, 29 April 2009 |
Date metadata was last modified | 10:25, 9 July 2018 |
Unique ID of original document | uuid:FA06DD447B36DE11AF4AF3122E53878B |
Copyright status | Copyright status not set |
Contact information |
Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
IIM version | 4 |