Wêne:The hidden dark side of NGC 24.jpg
Dosyeya orjînal (3432 × 3526 pixel, mezinbûnê data: 5,17 MB, MIME-typ: image/jpeg)
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This shining disc of a spiral galaxy sits approximately 25 million light-years away from Earth in the constellation of Sculptor. Named NGC 24, the galaxy was discovered by British astronomer William Herschel in 1785, and measures some 40 000 light-years across. This picture was taken using the NASA/ESA Hubble Space Telescope’s Advanced Camera for Surveys, known as ACS for short. It shows NGC 24 in detail, highlighting the blue bursts (young stars), dark lanes (cosmic dust), and red bubbles (hydrogen gas) of material peppered throughout the galaxy’s spiral arms. Numerous distant galaxies can also been seen hovering around NGC 24’s perimeter. However, there may be more to this picture than first meets the eye. Astronomers suspect that spiral galaxies like NGC 24 and the Milky Way are surrounded by, and contained within, extended haloes of dark matter. Dark matter is a mysterious substance that cannot be seen; instead, it reveals itself via its gravitational interactions with surrounding material. Its existence was originally proposed to explain why the outer parts of galaxies, including our own, rotate unexpectedly fast, but it is thought to also play an essential role in a galaxy’s formation and evolution. Most of NGC 24’s mass — a whopping 80 % — is thought to be held within such a dark halo. Coordinates Position (RA): 0 9 56.19 Position (Dec): -24° 57' 50.57" Field of view: 2.86 x 2.94 arcminutes Orientation: North is 31.4° left of vertical Colours & filters Band Wavelength Telescope Optical V 606 nm Hubble Space TelescopeACS Infrared I 814 nm Hubble Space Telescope ACS Optical V 606 nm Hubble Space Telescope ACS InfraredI 814 nm Hubble Space Telescope ACS. |
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| Dîrok | (released) | |||
| Çavkanî | http://spacetelescope.org/images/potw1639a/ | |||
| Xwedî | ESA/Hubble and NASA | |||
| Destûr (Dîsa bikaranînê vê dosyeye) |
  This file is licensed under the Creative Commons Attribution 4.0 International license. Lê bar kirin: ESA/Hubble
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| Dîrok/Katjimêr | Wêneyê biçûk | Mezinahî | Bikarhêner | Şirove | |
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| niha | 08:11, 1 çiriya pêşîn 2016 | | 3432 x 3526 (5,17 MB) | Huntster | Full resolution. |
| 09:44, 26 îlon 2016 |  | 1280 x 1315 (379 KB) | Jmencisom | User created page with UploadWizard |
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