Datei:A broad and narrow galactic view (potw2423a).jpg
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![Datei:A broad and narrow galactic view (potw2423a).jpg](http://upload.wikimedia.org/wikipedia/commons/thumb/0/0c/A_broad_and_narrow_galactic_view_%28potw2423a%29.jpg/657px-A_broad_and_narrow_galactic_view_%28potw2423a%29.jpg)
Größe dieser Vorschau: 657 × 600 Pixel. Weitere Auflösungen: 263 × 240 Pixel | 526 × 480 Pixel | 842 × 768 Pixel | 1.122 × 1.024 Pixel | 2.244 × 2.048 Pixel | 4.183 × 3.817 Pixel
Originaldatei (4.183 × 3.817 Pixel, Dateigröße: 7,64 MB, MIME-Typ: image/jpeg)
Diese Datei und die Informationen unter dem roten Trennstrich werden aus dem zentralen Medienarchiv Wikimedia Commons eingebunden.
Beschreibung
BeschreibungA broad and narrow galactic view (potw2423a).jpg |
English: This Picture of the Week features the barred spiral galaxy NGC 3059, which lies about 57 million light-years from Earth. The data used to compose this image were collected by Hubble in May 2024, as part of an observing programme that studied a number of galaxies. All the observations were made using the same range of filters: partially transparent materials that allow only very specific wavelengths of light to pass through. Filters are used extensively in observational astronomy, and can be calibrated to allow either extremely narrow or somewhat broader ranges of light through. Narrow-band filters are invaluable from a scientific perspective because certain light wavelengths are associated with specific physical and chemical processes. For example, under particular conditions, hydrogen atoms are known to emit red light with wavelength value of 656.46 nanometres. Red light at this wavelength is known as H-alpha emission, or the ‘H-alpha line’. It is very useful to astronomers because its presence acts as an indicator of certain physical processes and conditions; it is often a tell-tale sign of new stars being formed, for example.Thus, narrow-band filters calibrated to allow H-alpha emission through can be used to identify regions of space where stars are forming. Such a filter was used for this image, the narrow-band filter called F657N or the H-alpha filter. The F stands for filter, and the N stands for narrow. The numerical value refers to the peak wavelength (in nanometres) that the filter lets through. The eagle-eyed amongst you may have noticed that 657 is very close to the 656.46 H-alpha line’s wavelength. Data collected using five other filters contributed to this image as well, all of which were wide-band filters; meaning that they allow a wider range of light wavelengths through. This is less useful for identifying extremely specific lines (such as the H-alpha line) but still enables astronomers to explore relatively specific parts of the electromagnetic spectrum. In addition, collectively the information from multiple filters can be used to make beautiful images such as this one.[Image Description: A spiral galaxy seen face-on, so that its many arms and its glowing, bar-shaped core can be easily seen. The arms are filled with bluish patches of older stars, pink patches where new stars are forming, and dark threads of dust. A few bright stars with cross-shaped diffraction spikes lie in the foreground.] |
Datum | 3. Juni 2024 (Hochladedatum) |
Quelle | A broad and narrow galactic view |
Urheber | ESA/Hubble & NASA, D. Thilker |
Andere Versionen |
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Lizenz
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Conditions:
Notes:
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Namensnennung: ESA/Hubble
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Kurzbeschreibungen
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This Picture of the Week features the barred spiral galaxy NGC 3059, which lies about 57 million light-years from Earth.
image/jpeg
3.817 Pixel
4.183 Pixel
8.011.164 Byte
6e5f97c9a074bf9cb12b03a8f58e03e045ea8c0f
pHash checksum Englisch
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Dateiversionen
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Version vom | Vorschaubild | Maße | Benutzer | Kommentar | |
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aktuell | 11:01, 3. Jun. 2024 | ![]() | 4.183 × 3.817 (7,64 MB) | OptimusPrimeBot | #Spacemedia - Upload of https://cdn.esahubble.org/archives/images/large/potw2423a.jpg via Commons:Spacemedia |
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Metadaten
Diese Datei enthält weitere Informationen (beispielsweise Exif-Metadaten), die in der Regel von der Digitalkamera oder dem verwendeten Scanner stammen. Durch nachträgliche Bearbeitung der Originaldatei können einige Details verändert worden sein.
Quelle | ESA/Hubble |
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Namensnennung/Veröffentlicher | ESA/Hubble & NASA, D. Thilker |
Kurztitel |
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Bildtitel |
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Nutzungsbedingungen |
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Erfassungszeitpunkt | 06:00, 3. Jun. 2024 |
Software | Adobe Photoshop 25.7 (Windows) |
Speicherzeitpunkt | 21:56, 31. Mai 2024 |
Digitalisierungszeitpunkt | 13:50, 14. Mai 2024 |
Datum, zu dem die Metadaten letztmalig geändert wurden | 23:56, 31. Mai 2024 |
Eindeutige Kennung des ursprünglichen Dokuments | xmp.did:5213c347-3a19-0e44-b1cd-b0ca0000d209 |
Stichwörter | NGC 3059 |
Kontaktinformationen |
ESA Office, Space Telescope Science Institute, 3700 San Martin Dr Baltimore, MD, 21218 United States |
IIM-Version | 4 |