Datoteka:A curious supernova in NGC 2441.jpg

Stranica ne postoji na drugim jezicima.
Izvor: Wikipedija

Vidi sliku u punoj veličini ‎(2.913 × 1.861 piksela, veličina datoteke: 2,89 MB, MIME tip: image/jpeg)


Logo Wikimedijinog spremnika Ova je datoteka sa Zajedničkog poslužitelja i mogu je rabiti drugi projekti. Opis s njezine stranice s opisom datoteke prikazan je ispod.

Sažetak

Opis
English: This bright spiral galaxy is known as NGC 2441, located in the northern constellation of Camelopardalis (The Giraffe). However, NGC 2441 is not the only subject of this new Hubble image; the galaxy contains an intriguing supernova named SN1995E, visible as a small dot at the approximate centre of this image. For a labelled view, see potw1425b.

Supernova SN1995E, discovered in 1995 as its name suggests is a type Ia supernova. This kind of supernova is found in binary systems, where one star — a white dwarf — drags matter from its orbiting companion until it becomes unstable and explodes violently. White dwarf stars all become unbalanced once they reach the same mass, meaning that they all form supernovae with the same intrinsic brightness. Because of this, they are used as standard candles to measure distances in the Universe.

But SN1995E may be useful in another way. More recent observations of this supernova have suggested that it may display a phenomenon known as a light echo, where light is scattered and deflected by dust along our line of sight, making it appear to “echo” outwards from the source. In 2006, Hubble observed SN1995E to be fading in a way that suggested its light was being scattered by a surrounding spherical shell of dust. These echoes can be used to probe both the environments around cosmic objects like supernovae, and the characteristics of their progenitor stars. If SN1995E does indeed have a light echo, it would belong to a very elite club; only two other type Ia supernovae have been found to display light echoes (SN1991T and SN1998bu).

NGC 2441 was first seen by Wilhelm Tempel in 1882, a German astronomer with a keen eye for comets. In total, Tempel observed and documented some 21 comets, several of which were named after him.

A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Nick Rose.
Datum
Izvor http://www.spacetelescope.org/images/potw1425a/
Autor

ESA/Hubble & NASA

Acknowledgement: Nick Rose

Licencija

w:hr:Creative Commons
imenovanje autora
imenovanje autora
 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:
  • The full image or footage credit must be presented in a clear and readable manner to all users, with the wording unaltered (for example: "ESA/Hubble"). Web texts should be credited to ESA/Hubble (except when used by media). The credit should not be hidden or disassociated from the image footage. Links should be active if the credit is online. See the usage rights Q&A section on the ESA copyright page for guidance.
  • ESA/Hubble materials may not be used to state or imply the endorsement by ESA/Hubble or any ESA/Hubble employee of a commercial product or service.
  • ESA/Hubble requests a copy of the product sent to them to be indexed in their archive.
  • If an image shows an identifiable person, using that image for commercial purposes may infringe that person's right of privacy, and separate permission should be obtained from the individual.
  • If images or visuals are changed significantly from the original work (apart from resizing, cropping), we suggest that the changes are mentioned after the credit line. For example "Original image by ESA/Hubble (M. Kornmesser), warping and recolouring by NN".

Notes:

  • Note that this general permission does not extend to the use of ESA/Hubble's logo, which shall remain protected and may not be used or reproduced without prior and individual written consent of ESA/Hubble.
  • Also note that music, scientific papers and code on the esahubble.org site are not released under this license and can not be used for non-ESA/Hubble products.
  • By reproducing ESA/Hubble material, in part or in full, the user acknowledges the terms on which such use is permitted.
w:hr:Creative Commons
imenovanje autora
This file is licensed under the Creative Commons Attribution 4.0 International license.
Autor: ESA/Hubble
Slobodno smijete:
  • dijeliti – umnožavati, distribuirati i javnosti priopćavati djelo
  • remiksirati – prerađivati djelo
Pod sljedećim uvjetima:
  • imenovanje autora – Morate pripisati odgovarajuće autorske zasluge, dati poveznicu na licenciju, te naznačiti jesu li načinjene promjene autorskog djela. Prethodno navedeno možete učiniti na svaki razuman način, ali ne na način koji bi sugerirao da Vi ili Vaše korištenje licencorova djela ima izravno licencorovo odobrenje.

Opisi

Dodajte kratko objašnjenje što predstavlja ova datoteka

Predmeti prikazani u ovoj datoteci

motiv

Određene vrijednosti bez stavke na projektu Wikipodatci

nastanak

23. lipnja 2014

vrsta medija

image/jpeg

checksum engleski

d754c94a8b8a9c78fe5305fdf6aadcdfe6c0ef5f

način određivanja: SHA-1

data size engleski

3.035.360 Bajt

visina

1.861 točka

širina

2.913 točka

Povijest datoteke

Kliknite na datum/vrijeme kako biste vidjeli datoteku kakva je tada bila.

Datum/VrijemeMinijaturaDimenzijeSuradnikKomentar
sadašnja16:09, 25. lipnja 2014.Minijatura za inačicu od 16:09, 25. lipnja 2014.2.913 × 1.861 (2,89 MB)JmencisomUser created page with UploadWizard

Na ovu sliku vode poveznice sa sljedećih stranica:

Globalna uporaba datoteke

Sljedeći wikiji rabe ovu datoteku:

Metapodatci

Ova datoteka sadržava dodatne podatke koje je vjerojatno dodala digitalna kamera ili skener u procesu snimanja odnosno digitalizacije. Ako je datoteka mijenjana, podatci možda nisu u skladu sa stvarnim stanjem.

Dobavljeno iz "https://hr.wikipedia.org/wiki/Datoteka:A_curious_supernova_in_NGC_2441.jpg"