File:Potw1749a.tif
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Fichièr d'origina (1 075 × 1 075 pixèl, talha del fichièr: 107 Ko, tipe MIME: image/tiff)
Aqueste fichièr proven de Wikimedia Commons?. Las informacions que lo concernisson son afichadas çaijós (procedura). |
Descripcion
DescripcionPotw1749a.tif |
English: VLT's SPHERE spies rocky worlds
These images were taken by ESO's SPHERE (Spectro-Polarimetric High-Contrast Exoplanet Research) instrument, installed on the Very Large Telescope at the Paranal Observatory, Chile. These strikingly-detailed views reveal four of the millions of rocky bodies in the main asteroid belt, a ring of asteroids between Mars and Jupiter that separates the rocky inner planets of the Solar System from the gaseous and icy outer planets. Clockwise from top left, the asteroids shown here are 29 Amphitrite, 324 Bamberga, 2 Pallas, and 89 Julia. Named after the Greek goddess Pallas Athena, 2 Pallas is about 510 kilometres wide. This makes it the third largest asteroid in the main belt and one of the biggest asteroids in the entire Solar System. It contains about 7% of the mass of the entire asteroid belt — so hefty that it was once classified as a planet. A third of the size of 2 Pallas, 89 Julia is thought to be named after St Julia of Corsica. Its stony composition led to its classification as an S-type asteroid. Another S-type asteroid is 29 Amphitrite, which was only discovered in 1854. 324 Bamberga, one of the largest C-type asteroid in the asteroid belt, was discovered even later: Johann Palisa found it in 1892. Today, it is understood that C-type asteroids may actually be bodies from the outer Solar System following the migration of the giant planets. As such, they may contain ice in their interior. Although the asteroid belt is often portrayed in science fiction as a place of violent collisions, packed full of large rocks too dangerous for even the most skilled of space pilots to navigate, it is actually very sparse. In total, the asteroid belt contains just 4% of the mass of the Moon, with about half of this mass contained in the four largest residents: Ceres, 4 Vesta, 2 Pallas, and 10 Hygiea. Credit: ESO/Vernazza et al. |
Data | 4 December 2017, 06:00 (release) |
Font | http://www.eso.org/public/images/potw1749a/ |
Autor |
Credit: ESO/Vernazza et al. |
Publicat jos licéncia(s)
This media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts 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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Data e ora | Miniatura | Dimensions | Utilizaire | Comentari | |
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actual | 4 decembre de 2017 a 06.38 | 1 075×1 075 (107 Ko) | Fabian RRRR | =={{int:filedesc}}== {{Information |description={{en|1='''VLT’s SPHERE spies rocky worlds VLT’s SPHERE spies rocky worlds These images were taken by ESO’s SPHERE (Spectro-Polarimetric High-contrast Exoplanet REsearch) instrument, installed on ES... |
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Largor | 1 075 px |
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Nautor | 1 075 px |
Bits per compausanta |
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Tipe de compression | LZW |
Composicion dels pixèls (Modèl colorimetric) | RVB |
Orientacion | Normala |
Nombre de compausants (Compausantas per pixèl) | 3 |
Nombre de linhas per benda | 81 |
Resolucion orizontala | 72 ppp |
Resolucion verticala | 72 ppp |
Arrengament de las donadas | Donadas atenentas |
Logicial utilizat | Adobe Photoshop CC (Windows) |
Data e ora de cambiament del fichièr | 30 novembre de 2017 a 11.19 |
Espaci colorimetric | Pas calibrat |