File:Galaxy cluster MACS J2129-0741 and lensed galaxy MACS2129-1.jpg
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DescrizioneGalaxy cluster MACS J2129-0741 and lensed galaxy MACS2129-1.jpg |
English: Acting as a natural telescope in space, the gravity of the extremely massive foreground galaxy cluster MACS J2129-0741 magnifies, brightens, and distorts the far-distant background galaxy MACS2129-1, shown in the top box.
The middle box is a blown-up view of the gravitationally lensed galaxy. The bottom box displays a reconstructed image, based on modeling, that shows what the galaxy would look like if the galaxy cluster were not present. The galaxy appears red because it is so distant that its light is shifted into the red part of the spectrum. |
Data | |
Fonte | https://www.spacetelescope.org/images/opo1726a/ |
Autore | NASA, ESA, STScI, and Sune Toft (Dark Cosmology Centre at the Niels Bohr Inst., Univ. of Copenhagen) |
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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.
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22 giu 2017
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attuale | 15:56, 23 giu 2017 | 3 528 × 2 822 (5,54 MB) | Jmencisom | User created page with UploadWizard |
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Autore | Space Telescope Science Institut |
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Fonte | ESA/Hubble |
Crediti | NASA, ESA, STScI, and Sune Toft (Dark Cosmology Centre at the Niels Bohr Inst., Univ. of Copenhagen) |
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Data e ora di creazione dei dati | 12:13, 22 giu 2017 |
Commento del file JPEG | By combining the power of a Ònatural lensÓ in space with the capability of NASAÕs Hubble Space Telescope, astronomers made a surprising discoveryÑthe first example of very compact yet massive disk-shaped and rotating galaxy that stopped making stars only a few billion years after the big bang. Finding a galaxy that is pancake-shapedÑmuch like our own Milky WayÑso early in the history of the universe challenges the current understanding of how massive galaxies form and evolve, say researchers.
The galaxy, called MACS 2129-1, is considered ÒdeadÓ because it is no longer making stars. The existence of dead galaxies so earlyÑwhen the universe was just one-quarter its current ageÑhas long been a puzzle, as the Universe at that time was full of gas and at the peak of the cosmic star formation history. The leading theory has been that they formed in galaxy collisions that efficiently drove all the gas into the center of the collision and turned it into stars. ÒPerhaps we have been blind to the fact that early ÒdeadÓ galaxies could in fact be disks, simply because we havenÕt been able to resolve them,Ó said study leader Sune Toft of the Dark Cosmology Centre at the Niels Bohr Institute, University of Copenhagen. ÒThis new insight may force us to rethink the whole cosmological context of how galaxies burn out early on and evolve into local elliptical-shaped galaxies.Ó When the universe was just 3 billion years old, half of the most massive galaxies were extremely compact and had already completed their star formation. Astronomers believe that they ultimately grew into the most massive elliptical galaxies seen in the nearby universe today. Scientists theorize they did this through mergers with small companion galaxies, which added to the stars on the galaxyÕs outskirts. Confirming this scenario requires more powerful telescopes than are currently available, whether on Earth or in space. However, through the phenomenon known as Ògravit |
Software | Adobe Photoshop CC 2017 (Macintosh) |
Data e ora di modifica del file | 10:07, 22 giu 2017 |
Data e ora di digitalizzazione | 06:27, 8 giu 2017 |
Data in cui i metadata sono stati modificati l'ultima volta | 11:07, 22 giu 2017 |
ID univoco del documento originale | xmp.did:ac9fcda4-2290-48dd-b811-31d410d30384 |
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Informazioni di contatto | outreach@stsci.edu
Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
Versione IIM | 4 |