File:Orion Rises Over Mount Etna (ann22042ag).jpg
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DescriptionOrion Rises Over Mount Etna (ann22042ag).jpg |
English: Image title: Orion Rises Over Mount Etna Author: Dario Giannobile Country: ItalyTaken in February 2021, this image is a composite of an astronomy picture in the background and Mount Etna, the famous volcano in Sicily, Italy, in the foreground. Prominently, we see the red hydrogen clouds in space in the area of Orion. Barnard’s Loop is the gigantic bow with the Great Orion Nebula and the Horsehead Nebula in its centre. The deeper-coloured Horse Head is below the southernmost stars in Orion’s Belt, which is the line of white stars above the red nebula. Clearly visible is also the division between the Small and the Great Orion Nebula, the circular and the trapezium-shaped structure in light pink within which one of the nearest star-forming regions is located. The nebula is only a bit more than a thousand light-years away.In the middle-left, close to the edge of the image, the small red structure is the rosette Nebula in the constellation Monoceros. It hosts a young star cluster and the deep red colour of this hydrogen cloud indicates its potential to build new stars in the future if the material is compressed again. All these reddish objects are strongly processed in this image, as they are not visible to the unaided eye.Still, this image provides an interesting feature; the red supergiant star Betelgeuse lies in the middle of the image and it seems to be directly above the active volcano Mount Etna. At the foot of this volcano is an ancient settlement, the city of Catania. We consider both Betelgeuse and Mount Etna somehow dangerous — but which of them will erupt first?Ok, we know that Etna occasionally erupts. Normally it exhibits only small eruptions, but the bigger ones happen every few centuries. We also know that Betelgeuse as a giant star will become a supernova in the future. Astronomers call the timescale for the potential supernova short, implying that it will be only 10 000 or maybe 100 000 years until this star explodes. This is “soon” for astronomers, meaning that on Earth, two to four precession cycles will pass by (with the consequence that the Sahara will turn green and dry again two to four times), continental drift will take Africa further north and cause the Alps to grow in height, the Niagara falls in America will wash the rock completely away and only after all this (and much more) happening on Earth will Betelgeuse explode as a supernova. Mount Etna is much more dangerous for the people in Sicily, and Catania in particular, because it will erupt sooner.Also see image in Zenodo: https://doi.org/10.5281/zenodo.7425536 |
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Date | 15 December 2022 (upload date) | ||
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Author | Dario Giannobile/IAU OAE | ||
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Author | Dario Giannobile |
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Credit/Provider | Dario Giannobile/IAU OAE |
Source | International Astronomical Union |
Online copyright statement | www.dariogiannobile.com |
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Date and time of data generation | 12:00, 15 December 2022 |
JPEG file comment | Orion Rises Over Mount Etna Stack, Blend L'immagine mostra la costellazione di Orione in tutta la sua bellezza mentre sorge sopra il fianco del Vulcano Etna. La scelta del punto di ripresa è stata attentemente valutata in modo da contenere l'intera costellazione sopra il vulcano appena innevato utilizzando una focale di ripresa di 50mm Orione è sicuramente la costellazione più bella del cielo invernale. Si trova in una regione di cielo ricca di stelle brillanti come Sirio a sud-est, Procione a est, Castore e Polluce a nord-est, Capella a nord e Aldebarana a nord ovest. La stella più brillante è Rigel, la beta, di magn. 0.1, che si trova a ben 773 anni luce. Se appare così brillante, nonostante la distanza, vuol dire che è un vero faro cosmico capace di brillare ben 44 mila volte più del Sole. La stella Alfa, Betelgeuse, è una super gigante così grande da contenere l'orbita della terra se fosse al posto del Sole. Varia la sua luminosità da 0,2 a 0,8 benchè in genere sia di 0,5. Un'altra stella variabile (leggermente) tra le principali è Mintaka (Delta, 2.2m) situata quasi all'equatore celeste. La stella Theta, nel centro della grande nebulosa M42, è nota come trapezio, dalla posizione delle quattro principali componenti. Sono proprio le stelle molto calde del trapezio a eccitare i gas della nebulosa e a farla risplendere. Molto più elusiva è la nebulosa testa di cavallo o Barnard 33 che costituisce una baia oscura sulla nebulosa IC434. La costellazione inoltre appare avvolta da una grande nebulosa ad anello che prende il nome di Anello di Barnard. Sulle spalle e attorno alla stella Meissa, si trova una grande nebulosa diffusa dal nome SH 2-264. Particolarmente curiosa è la forma della nebulosa testa di strega o NGC1909, una nebulosa a riflessione, che si trova nella costellazione di Eridano ma di fronte a Rigel che ne è appunto la fonte di luce. Esistono diverse versioni attorno al mito di Orione. La più famosa racconta che Orione, un gigante cacciatore, si vantò con la dea Artemide, e la madre di lei, di essere il cacciatore più abile e di potere uccidere qualsiasi bestia sulla terra. Allora Gea (la terra) indignata per la sua presunzione fremette e da una spaccatura del terreno fece uscire uno scorpione che lo punse facendolo morire. Da allora il cacciatore e lo scoprione sono nemici mortali al punto da essere collocati nei punti opposti del cielo in modo da non incontrarsi mai. The image shows the constellation of Orion in all its beauty as it rises above the flank of the Etna Volcano. The choice of the shooting point has been carefully evaluated in order to contain the entire constellation above the newly snow-capped volcano using a 50mm focal length. Orion is certainly the most beautiful constellation in the winter sky. It is located in a region of sky full of bright stars such as Sirius in the southeast, Procyon in the east, Castor and Pollux in the northeast, Capella in the north and Aldebarana in the northwest. The brightest star is Rigel, the beta, of magn. 0.1, which is 773 light years away. If it appears so bright, despite the distance, it means that it is a true cosmic lighthouse capable of shining 44,000 times more than the Sun. The star Alpha, Betelgeuse, is a super giant so large that it can contain the orbit of the earth if it were al place of the Sun. Its brightness varies from 0.2 to 0.8 although generally it is 0.5. Another (slightly) variable star among the main ones is Mintaka (Delta, 2.2m) located almost at the celestial equator. The Theta star, in the center of the large M42 nebula, is known as the trapezoid, from the position of the four main components. It is the very hot stars of the trapezoid that excite the gases of the nebula and make it shine. Much more elusive is the horsehead nebula or Barnard 33 which forms a dark bay on the IC434 nebula. The constellation also appears enveloped by a large ring nebula that takes the name of Barnard's Ring. On the shoulders and around the star Meissa, there is a large diffuse nebula named SH 2-264. Particularly curious is the shape of the witch's head nebula or NGC1909, a reflection nebula, which is located in the constellation of Eridanus but in front of Rigel who is precisely the source of light. There are several versions around the myth of Orion. The most famous one tells that Orion, a giant hunter, boasted to the goddess Artemis, and her mother, that he was the most skilled hunter and that he could kill any beast on earth. Then Gea (the earth), indignant for his presumption, shuddered and from a crack in the ground he made a scorpion come out that stung him making him die. Since then the hunter and the uncovering are deadly enemies to the point of being placed in opposite points of the sky so as to never meet. IG: https://www.instagram.com/dariogiannobile/ Canon 6d, Sigma 50mm, f/2, 2 min, iso 400 Sky: 19 light frames, 17 dark frames, 17 flat frames, 17 flat dark frames Landscape: one single frame |
Software used | Adobe Photoshop 24.0 (Windows) |
File change date and time | 09:28, 1 December 2022 |
Serial number of camera | 128053002148 |
Lens used | 50mm F1.4 DG HSM | Art 014 |
Rating (out of 5) | 0 |
Date and time of digitizing | 23:01, 2 November 2021 |
Date metadata was last modified | 10:28, 1 December 2022 |
Writer | dario giannobile |
Unique ID of original document | BED319EC6CDFE9FC40E2C7FA1F799C5D |
Copyright status | Copyrighted |
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Contact information |
98-bis Blvd Arago Paris, None, F-75014 FRANCE |
IIM version | 4 |