File:The Hubble Sequence throughout the Universe's history.jpg
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File originale (6 550 × 3 200 pixel, dimensione del file: 4,12 MB, tipo MIME: image/jpeg)
Dettagli
| Descrizione |
English: This image shows "slices" of the Universe at different times throughout its history (present day, and at 4 and 11 billion years ago). Each slice goes further back in time, showing how galaxies of each type appear. The shape is that of the Hubble tuning fork diagram, which describes and separates galaxies according to their morphology into spiral (S), elliptical (E), and lenticular (S0) galaxies. On the left of this diagram are the ellipticals, with lenticulars in the middle, and the spirals branching out on the right side. The spirals on the bottom branch have bars cutting through their centres.
The present-day Universe shows big, fully formed and intricate galaxy shapes. As we go further back in time, they become smaller and less mature, as these galaxies are still in the process of forming. This image is illustrative. the Hubble images of nearby and distant galaxies used were selected based on their appearance; their individual distances are only approximate. |
| Data | |
| Fonte | http://www.spacetelescope.org/images/heic1315a/ |
| Autore | NASA, ESA, M. Kornmesser |
Licenza
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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. |
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| Data/Ora | Miniatura | Dimensioni | Utente | Commento | |
|---|---|---|---|---|---|
| attuale | 03:33, 20 ago 2013 | | 6 550 × 3 200 (4,12 MB) | wikimediacommons>Jmencisom | User created page with UploadWizard |
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