File:NGC 2090.jpg
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| Descrizione |
English: Featured in this new NASA/ESA Hubble Space Telescope Picture of the Week is the spiral galaxy NGC 2090, located in the constellation Columba. This galaxy is notable as a part of the group of galaxies studied in Hubble’s Extragalactic Distance Scale Key Project, which aimed to determine a new state-of-the-art value for the Hubble constant, one of the then-new telescope’s primary science goals. The contribution of NGC 2090 was in calibrating the Tully-Fisher (TF) distance method, by observing Cepheid variablestars in the galaxy. The Cepheid-based measurement from that study in 1998 put NGC 2090 as 37 million light-years away; the newest measurement from 2020, using the TF method, has NGC 2090 slightly farther away, at 40 million light-years. Before and since that project, NGC 2090 has been well studiedas a very prominent nearby example of star formation. It has been described as a flocculent spiral, meaning a spiral galaxy with a patchy, dusty disc and arms that are flaky or not visible at all. This Hubble image shows well why NGC 2090 earned that description, but its spiral arms do appear amongthe dust as winding lanes of light. NGC 2090 is a galaxy still full of activity, with clusters of star formation at various stages of evolution spread across the disc. Examining star formation and the movement of matter in galaxies was the motivation for these Hubble observations, taken in October of this year. Likewise Hubble’s partner in space astronomy, the NASA/ESA/CSA James Webb Space Telescope, has also spied on this galaxy to add infrared data to this overall picture of galaxy evolution. [Image Description: A spiral galaxy with a wide, oval-shaped disc. It has a shining spot at thecentre which is surrounded by a whirl of dark threads and patches of dust, all atop a luminous disc. Some brighter lanes curving through the disc indicate the galaxy’s spiral arms. The glow of the disc fades smoothly into a dark background where faint, extended patches of stars can be seen, as well as some foreground stars.]
Credit: ESA/Hubble & NASA, D. Thilker |
| Data | |
| Fonte | https://esahubble.org/images/potw2448a/ |
| Autore | ESA/Hubble & NASA, D. Thilker |
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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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| attuale | 06:02, 25 nov 2024 | | 4 078 × 3 933 (6,06 MB) | Phantomdj | Uploaded a work by ESA/Hubble & NASA, D. Thilker from https://esahubble.org/images/potw2448a/ with UploadWizard |
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