Ficheiro:A spiral snowflake.jpg

De testwiki
Saltar á navegación Saltar á procura
Ficheiro orixinal (3.970 × 3.970 píxeles; tamaño do ficheiro: 7,32 MB; tipo MIME: image/jpeg)

Este ficheiro é de Wikimedia Commons e pode utilizarse noutros proxectos. A descrición da páxina de descrición do ficheiro móstrase a continuación.

Resumo

Descrición
English: Spiral galaxies together with irregular galaxies make up approximately 60% of the galaxies in the local Universe. However, despite their prevalence, each spiral galaxy is unique — like snowflakes, no two are alike. This is demonstrated by the striking face-on spiral galaxy NGC 6814, whose luminous nucleus and spectacular sweeping arms, rippled with an intricate pattern of dark dust, are captured in this NASA/ESA Hubble Space Telescope image.

NGC 6814 has an extremely bright nucleus, a telltale sign that the galaxy is a Seyfert galaxy. These galaxies have very active centres that can emit strong bursts of radiation. The luminous heart of NGC 6814 is a highly variable source of X-ray radiation, causing scientists to suspect that it hosts a supermassive black hole with a mass about 18 million times that of the Sun.

As NGC 6814 is a very active galaxy, many regions of ionised gas are studded along its spiral arms. In these large clouds of gas, a burst of star formation has recently taken place, forging the brilliant blue stars that are visible scattered throughout the galaxy.
Data
Orixe http://spacetelescope.org/images/potw1619a/
Autoría

ESA/Hubble & NASA

Acknowledgement: Judy Schmidt (Geckzilla)

Licenza


recoñecemento
recoñecemento
 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:gl:Creative Commons
recoñecemento
Este ficheiro está licenciado baixo a licenza Creative Commons recoñecemento 4.0 internacional.
Recoñecemento:
ESA/Hubble
Vostede é libre de:
  • compartir – copiar, distribuír e difundir a obra
  • facer obras derivadas – adaptar a obra
Baixo as seguintes condicións:
  • recoñecemento – Debe indicar a debida atribución de autoría, fornecer unha ligazón á licenza e indicar se se realizaron cambios. Pode facer isto de calquera forma razoable, mais non nunha forma que indique que quen posúe a licenza apoia ou subscribe o seu uso da obra.

Pés de foto

Engade unha explicación dunha liña do que representa este ficheiro

Elementos retratados neste ficheiro

representa a entidade

suma de verificación

9c69c8fa26c0ad9a053785bb7a48255806364793

método de determinación: SHA-1

tamanho dos dados portugués

7.679.284 Byte

altura

3.970 píxel

ancho

3.970 píxel

Historial do ficheiro

Prema nunha data/hora para ver o ficheiro tal e como estaba nese momento.

Data/HoraMiniaturaDimensiónsUsuarioComentario
actual16 de maio de 2016 ás 12:38Miniatura da versión ás 12:38 do 16 de maio de 20163.970 × 3.970 (7,32 MB)wikimediacommons>Szczureqfull resolution

A seguinte páxina usa este ficheiro:

Obtido de «https://gl.wiki.beta.math.wmflabs.org/wiki/Ficheiro:A_spiral_snowflake.jpg»