File:Blackeyegalaxy.jpg

Contenuti della pagina non supportati in altre lingue.
Wikibooks, manuali e libri di testo liberi.

File originale ‎(897 × 1 065 pixel, dimensione del file: 774 KB, tipo MIME: image/jpeg)

Logo di Wikimedia Commons Questo file proviene da Wikimedia Commons. La pagina di descrizione associata è riportata qui sotto.

Wikipedia

 Questa è una immagine in vetrina su Wikipedia in azerbaigiano (Seçilmiş şəkillər) dove è considerata una delle migliori immagini.

Se pensi che questo file debba essere in vetrina anche su Wikimedia Commons, sentiti libero di candidarlo.
Se hai un'immagine della stessa qualità che può essere pubblicata con almeno una licenza accettabile, caricala, usa il tag di copyright appropriato e candidala.

Descrizione

This image of Messier 64 (M64) was taken with Hubble's Wide Field Planetary Camera 2 (WFPC2). The color image is a composite prepared by the Hubble Heritage Team from pictures taken through four different color filters. These filters isolate blue and near-infrared light, along with red light emitted by hydrogen atoms and green light from Strömgren y.

M64 has a spectacular dark band of absorbing dust in front of the galaxy's bright nucleus, giving rise to its nicknames of the Black Eye or Evil Eye galaxy.

At first glance, M64 appears to be a fairly normal pinwheel-shaped spiral galaxy. As in the majority of galaxies, all of the stars in M64 are rotating in the same direction, clockwise as seen in the Hubble image. However, detailed studies in the 1990's led to the remarkable discovery that the interstellar gas in the outer regions of M64 rotates in the opposite direction from the gas and stars in the inner regions.

Active formation of new stars is occurring in the shear region where the oppositely rotating gases collide, are compressed, and contract. Particularly noticeable in the image are hot, blue young stars that have just formed, along with pink clouds of glowing hydrogen gas that fluoresce when exposed to ultraviolet light from newly formed stars.

Astronomers believe that the oppositely rotating gas arose when M64 absorbed a satellite galaxy that collided with it, perhaps more than one billion years ago. This small galaxy has now been almost completely destroyed, but signs of the collision persist in the backward motion of gas at the outer edge of M64.
Data
Fonte http://hubblesite.org/newscenter/archive/releases/2004/04/image/a/ (direct link)
Autore NASA and The Hubble Heritage Team (AURA/STScI)
Licenza
(Riusare questo file)
Public domain This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use.
The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag.

Didascalie

Aggiungi una brevissima spiegazione di ciò che questo file rappresenta

tipo di file

image/jpeg

checksum

d061ff273c08ee29b9d1b70c88e3e9714c72b45c

metodo di determinazione: SHA-1

dimensione dati

792 446 byte

altezza

1 065 pixel

larghezza

897 pixel

Cronologia del file

Fare clic su un gruppo data/ora per vedere il file come si presentava nel momento indicato.

Data/OraMiniaturaDimensioniUtenteCommento
attuale11:46, 2 giu 2005Miniatura della versione delle 11:46, 2 giu 2005897 × 1 065 (774 KB)CWitteThis image of M64 was taken with Hubble's Wide Field Planetary Camera 2 (WFPC2). The color image is a composite prepared by the Hubble Heritage Team from pictures taken through four different color filters. These filters isolate blue and near-infrared lig

Utilizzo globale del file

Anche i seguenti wiki usano questo file:

Visualizza l'utilizzo globale di questo file.

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.

Estratto da "https://it.wikibooks.org/wiki/File:Blackeyegalaxy.jpg"