Fichier:NGC 7331 (noao-n7331mortfield).jpg
Taille de cet aperçu : 800 × 546 pixels. Autres résolutions : 320 × 218 pixels | 640 × 437 pixels | 1 024 × 699 pixels | 1 280 × 873 pixels | 2 122 × 1 448 pixels.
Fichier d’origine (2 122 × 1 448 pixels, taille du fichier : 367 kio, type MIME : image/jpeg)
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Description
| Description |
English: NGC 7331 is one of 18 galaxies chosen by the HST Extragalactic Distance Scale Key Project to calibrate secondary distance estimators. The project will use the Hubble Space Telescope to obtain an accurate distance to galaxies via Cepheid variables, with the ultimate goal of using these to measure H0 (a cosmological parameter) to an external accuracy of 10%. It was determined this galaxy is 49 million light years away (and perhaps 30,000 light years across). In this image you will see some of the nearby neighbors being both spiral and elliptical galaxies. Nearby this field (not shown) is another famous group of galaxies known as Stephan's Quintet.This image was taken as part of Advanced Observing Program (AOP) program at Kitt Peak Visitor Center during 2014. |
| Date | 7 mai 2014 (date de téléversement) |
| Source | NGC 7331 |
| Auteur | KPNO/NOIRLab/NSF/AURA/Paul Mortfield and Dietmar Kupke/Flynn Haase |
| Autres versions |
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Conditions d’utilisation
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This media was created by the National Optical-Infrared Astronomy Research Laboratory (NOIRLab).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public NOIRLab website, along with the texts of press releases, announcements, images of the week and captions; are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. |
  Ce fichier est disponible selon les termes de la licence Creative Commons Attribution 4.0 International.
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| Date et heure | Vignette | Dimensions | Utilisateur | Commentaire | |
|---|---|---|---|---|---|
| actuel | 23 octobre 2023 à 19:31 | | 2 122 × 1 448 (367 kio) | OptimusPrimeBot | #Spacemedia - Upload of https://noirlab.edu/public/media/archives/images/large/noao-n7331mortfield.jpg via Commons:Spacemedia |
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