File:Hubble captures blobs of material sweeping through stellar disc AU Microscopii.tif
File originale (2 160 × 1 199 pixel, dimensione del file: 1,58 MB, tipo MIME: image/tiff)
Questo file e la sua pagina di descrizione (discussione · modifica) si trovano su Wikimedia Commons (?) |
Dettagli
DescrizioneHubble captures blobs of material sweeping through stellar disc AU Microscopii.tif |
English: These two images, both taken with the NASA/ESA Hubble Space Telescope, are taken six years apart. They show fast-moving blobs of material sweeping outwardly through a debris disc around the young, nearby red dwarf star AU Microscopii (AU Mic). Red dwarfs are the most abundant and longest-lived stars in our Milky Way. AU Mic, however, is only about 23 million years old, making it a very young star.
The top image was taken in 2011; the bottom in 2017. Hubble's Space Telescope Imaging Spectrograph (STIS) took the images in visible light. This comparison of the two images shows the six-year movement of one of the known blobs (marked by an arrow). Researchers estimate that the blob, which is zipping along at nearly 24 000 kilometres an hour, traveled more than 1300 million kilometres between 2011 and 2017. That is about the distance from Earth to Saturn. Astronomers do not know how the blobs are launched through the system. Eventually, the blob highlighted in the image will sweep through the disc, escape the star's gravitational grip, and race out into space. Astronomers expect the string of blobs to clear out the disc within 1.5 million years. Their estimated ejection speeds are between 14 000 kilometres per hour and 43 000 kilometres per hour, fast enough to escape the star's gravitational clutches. They currently range in distance from roughly 1500 million kilometres to more than 8800 million kilometres from the star. The disc, seen edge-on, is illuminated by scattered light from the star. The glare of the star, located at the centre of the disc, has been blocked out by the STIS coronagraph so that astronomers can see more structure in the disc. The bright dot above the left side of the disc in the 2017 image is a background star. The system resides 32 light-years away in the southern constellation Microscopium. |
Data | |
Fonte | https://www.spacetelescope.org/images/opo1902a/ |
Autore | NASA, ESA, J. Wisniewski (University of Oklahoma), C. Grady (Eureka Scientific), and G. Schneider (Steward Observatory) |
Licenza
ESA/Hubble images, videos and web texts are released by the ESA under the Creative Commons Attribution 4.0 International license and may on a non-exclusive basis be reproduced without fee provided they are clearly and visibly credited. Detailed conditions are below; see the ESA copyright statement for full information. For images created by NASA or on the hubblesite.org website, or for ESA/Hubble images on the esahubble.org site before 2009, use the {{PD-Hubble}} tag.
Conditions:
Notes:
|
- Tu sei libero:
- di condividere – di copiare, distribuire e trasmettere quest'opera
- di modificare – di adattare l'opera
- Alle seguenti condizioni:
- attribuzione – Devi fornire i crediti appropriati, un collegamento alla licenza e indicare se sono state apportate modifiche. Puoi farlo in qualsiasi modo ragionevole, ma non in alcun modo che suggerisca che il licenziante approvi te o il tuo uso.
Elementi ritratti in questo file
raffigura
9 gen 2019
Cronologia del file
Fare clic su un gruppo data/ora per vedere il file come si presentava nel momento indicato.
Data/Ora | Miniatura | Dimensioni | Utente | Commento | |
---|---|---|---|---|---|
attuale | 15:15, 10 gen 2019 | 2 160 × 1 199 (1,58 MB) | Jmencisom | User created page with UploadWizard |
Pagine che usano questo file
La seguente pagina usa questo file:
Utilizzo globale del file
Anche i seguenti wiki usano questo file:
- Usato nelle seguenti pagine di en.wikipedia.org:
- Usato nelle seguenti pagine di mk.wikipedia.org:
Metadati
Questo file contiene informazioni aggiuntive, probabilmente aggiunte dalla fotocamera o dallo scanner usati per crearlo o digitalizzarlo. Se il file è stato modificato, alcuni dettagli potrebbero non corrispondere alla realtà.
Descrizione dell'immagine | These two images, both taken with the NASA/ESA Hubble Space Telescope, are taken six years apart. They show fast-moving blobs of material sweeping outwardly through a debris disc around the young, nearby red dwarf star AU Microscopii (AU Mic). Red dwarfs are the most abundant and longest-lived stars in our Milky Way. AU Mic, however, is only about 23 million years old, making it a very young star. The top image was taken in 2011; the bottom in 2017. Hubble's Space Telescope Imaging Spectrograph (STIS) took the images in visible light. This comparison of the two images shows the six-year movement of one of the known blobs (marked by an arrow). Researchers estimate that the blob, which is zipping along at nearly 24 000 kilometres an hour, traveled more than 1300 million kilometres between 2011 and 2017. That is about the distance from Earth to Saturn. Astronomers do not know how the blobs are launched through the system. Eventually, the blob highlighted in the image will sweep through the disc, escape the star's gravitational grip, and race out into space. Astronomers expect the string of blobs to clear out the disc within 1.5 million years. Their estimated ejection speeds are between 14 000 kilometres per hour and 43 000 kilometres per hour, fast enough to escape the star's gravitational clutches. They currently range in distance from roughly 1500 million kilometres to more than 8800 million kilometres from the star. The disc, seen edge-on, is illuminated by scattered light from the star. The glare of the star, located at the centre of the disc, has been blocked out by the STIS coronagraph so that astronomers can see more structure in the disc. The bright dot above the left side of the disc in the 2017 image is a background star. The system resides 32 light-years away in the southern constellation Microscopium. Links: Hubble captures intricate structures inside a giant migrating blob NASA Press Release |
---|---|
Autore | Space Telescope Science Institute Office of Public Outreach |
Larghezza | 2 160 px |
Altezza | 1 199 px |
Bit per campione |
|
Schema di compressione | LZW |
Struttura dei pixel | RGB |
Orientamento | Normale |
Numero delle componenti | 3 |
Numero righe per striscia | 40 |
Risoluzione orizzontale | 72 punti per pollice (dpi) |
Risoluzione verticale | 72 punti per pollice (dpi) |
Disposizione dei dati | a blocchi (chunky) |
Software | Adobe Photoshop CC 2018 (Macintosh) |
Data e ora di modifica del file | 11:58, 18 dic 2018 |
Spazio dei colori | sRGB |
warning | identify: Incompatible type for "RichTIFFIPTC"; tag ignored. `TIFFFetchNormalTag' @ warning/tiff.c/TIFFWarnings/912. |