Ficheiro:A spiral snowflake.jpg

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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

w:gl:Creative Commons
recoñecemento
recoñecemento
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w:gl:Creative Commons
recoñecemento
Este ficheiro está licenciado baixo a licenza Creative Commons recoñecemento 4.0 internacional.
Recoñecemento: ESA/Hubble
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suma de verificación

9c69c8fa26c0ad9a053785bb7a48255806364793

método de determinación: SHA-1 portugués

tamanho dos dados portugués

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Data/HoraMiniaturaDimensiónsUsuarioComentario
actual16 de maio de 2016 ás 11:38Miniatura da versión ás 11:38 do 16 de maio de 20163.970 × 3.970 (7,32 MB)Szczureqfull resolution
9 de maio de 2016 ás 08:51Miniatura da versión ás 08:51 do 9 de maio de 20161.280 × 1.280 (473 kB)JmencisomUser created page with UploadWizard

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