Файл:NGC 1651 Potw2413a.jpg
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Цуьнах лаьцнаNGC 1651 Potw2413a.jpg |
English: This image shows a globular cluster known as NGC 1651. Like the object in another recent Picture of the Week, it is located about 162 000 light-years away in the largest and brightest of the Milky Way’s satellite galaxies, the Large Magellanic Cloud (LMC). A notable feature of this image is that the globular cluster almost fills the entire image, even though globular clusters are only about 10 to 300 light-years in diameter (NGC 1651 has a diameter of roughly 120 light-years). In contrast, there are numerous Hubble Pictures of the Week that feature entire galaxies — which can be tens or hundreds of millions of light-years in diameter — that also more or less fill the whole image. A common misconception is that Hubble and other large telescopes manage to observe wildly differently sized celestial objects by zooming in on them, as one would with a specialised camera here on Earth. However, whilst small telescopes might have the option to zoom in and out to a certain extent, large telescopes do not. Each telescope’s instrument has a fixed ‘field of view’ (the size of the region of sky that it can observe in a single observation). For example, the ultraviolet/visible light channel of Hubble’s Wide Field Camera 3 (WFC3), the channel and instrument that were used to collect the data used in this image, has a field of view roughly one twelfth the diameter of the Moon as seen from Earth. Whenever WFC3 makes an observation, that is the size of the region of sky that it can observe. The reason that Hubble can observe objects of such wildly different sizes is two-fold. Firstly, the distance to an object will determine how big it appears to be from Earth, so entire galaxies that are relatively far away might take up the same amount of space in the sky as a globular cluster like NGC 1651 that is relatively close by. In fact, there's a distant spiral galaxy lurking in this image, directly left of the cluster — though undoubtedly much larger than this star cluster, it appears small enough here to blend in with foreground stars! Secondly, multiple images spanning different parts of the sky can be mosaiced together to create single images of objects that are too big for Hubble’s field of view. This is a very complex task and is not typically done for Pictures of the Week, but it has been done for some of Hubble’s most iconic images. [Image Description: A spherical collection of stars, which fills the whole view. The stars merge into a bright, bluish core in the centre, and form a sparse band around that out to the edges of the image. A few stars liein front of the cluster, with visible diffraction spikes. The background is dark black.]
Coordinates Position (RA): 4 37 32.42 Position (Dec): -70° 35' 4.94" Field of view: 2.47 x 2.53 arcminutes Orientation: North is 0.0° right of vertical Colours & filters Band Wavelength Telescope Optical g 475 nm Hubble Space Telescope WFC3 Optical g 475 nm Hubble Space Telescope WFC3 Optical I 814 nm Hubble Space Telescope WFC3 Optical I 814 nm Hubble Space Telescope WFC3 |
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Хьост | https://esahubble.org/images/potw2413a/ | |||
Автор | ESA/Hubble & NASA, L. Girardi, F. Niederhofer | |||
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ХӀара файл лело йиш йу Creative Commons Attribution 4.0 International лицензица. Авторан цӀе дӀайазйар: Credit:
ESA/Hubble & NASA, J. Dalcanton, Dark Energy Survey/DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA
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Терахь/Хан | Жима | Файлан барам | Декъашхо | Билгалдаккхар | |
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карара | 2024, 27 март, 09:02 | 3736 × 3839 (6,45 Мб) | Loopjaw | Uploaded a work by ESA/Hubble & NASA, L. Girardi, F. Niederhofer from https://esahubble.org/images/potw2413a/ with UploadWizard |
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Хьост | ESA/Hubble |
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Кхоьхьург, хьа делла сурт | ESA/Hubble & NASA, L. Girardi, F. Niederhofer |
Йоцца цӀе |
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Суьртан цӏе |
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Лелоран биллам |
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Оригиналан терахь а, хан а | 2024, 25 март, 06:00 |
Лелина программа | Adobe Photoshop 25.3 (Windows) |
Файлан хийцам бина терахь а, хан а | 2024, 12 март, 01:21 |
Оцифровк йина терахь а, хан а | 2023, 23 ноябрь, 12:11 |
ТӀаьххьара метахаамаш хийцина терахь | 2024, 12 март, 02:21 |
ДӀадолалун документан ша тайпа ID | xmp.did:7d28e228-1333-534f-ae31-6d2e2b7c8ce7 |
Коьрта дешнаш | NGC 1651 |
Контактан хаам |
ESA Office, Space Telescope Science Institute, 3700 San Martin Dr Baltimore, MD, 21218 United States |
Верси IIM | 4 |